#define YRSD

#include <iostream>
#include <algorithm>
#include <array>
#include <bitset>
#include <map>
#include <numeric>
#include <queue>
#include <set>
#include <string>
#include <tuple>
#include <bit>
#include <chrono>
#include <functional>
#include <iomanip>
#include <utility>
#include <type_traits>
#include <cassert>
#include <cctype>
#include <cmath>
#include <cstring>
#include <ctime>
#include <limits>
#include <ranges>
#include <concepts>

#define TE template <typename T>
#define TES template <typename T, typename ...S>
#define Z auto
#define ep emplace_back
#define eb emplace
#define fi first
#define se second
#define bg begin
#define ed end
#define all(x) bg(x), ed(x)

#define ov(a, b, c, d, e, ...) e
#define FO1(a) for (int _ = 0; _ < (a); ++_)
#define FO2(i, a) for (int i = 0; i < (a); ++i)
#define FO3(i, a, b) for (int i = (a); i < (b); ++i)
#define FO4(i, a, b, c) for (int i = (a); i < (b); i += (c))
#define FOR(...) ov(__VA_ARGS__, FO4, FO3, FO2, FO1)(__VA_ARGS__)
#define FF1(a) for (int _ = (a) - 1; _ >= 0; --_)
#define FF2(i, a) for (int i = (a) - 1; i >= 0; --i)
#define FF3(i, a, b) for (int i = (b) - 1; i >= (a); --i)
#define FF4(i, a, b, c) for (int i = (b) - 1; i >= (a); i -= (c))
#define FOR_R(...) ov(__VA_ARGS__, FF4, FF3, FF2, FF1)(__VA_ARGS__)
#define FOR_subset(t, s) for (int t = (s); t > -1; t = (t == 0 ? -1 : (t - 1) & s))

#define sort ranges::sort

using namespace std;

TE using vc = vector<T>;
TE using vvc = vc<vc<T>>;
TE using T1 = tuple<T>;
TE using T2 = tuple<T, T>;
TE using T3 = tuple<T, T, T>;
TE using T4 = tuple<T, T, T, T>;
TE using max_heap = priority_queue<T>;
TE using min_heap = priority_queue<T, vc<T>, greater<T>>;
using u8 = unsigned char; using uint = unsigned int; using ll = long long;      using ull = unsigned long long;
using ld = long double;   using i128 = __int128;     using u128 = __uint128_t;  using f128 = __float128;
using u16 = uint16_t;
using PII = pair<int, int>;   using PLL = pair<ll, ll>;

#ifdef YRSD
constexpr bool dbg = 1;
#else
constexpr bool dbg = 0;
#endif

istream &operator>>(istream &I, i128 &x) {
  static string s;
  I >> s;
  int f = s[0] == '-';
  x = 0;
  const int N = (int)s.size();
  FOR(i, f, N) x = x * 10 + s[i] - '0';
  if (f) x = -x;
  return I;
}
ostream &operator<<(ostream &O, i128 x) {
  static string s;
  s.clear();
  bool f = x < 0;
  if (f) x = -x;
  while (x) s += '0' + x % 10, x /= 10;
  if (s.empty()) s += '0';
  if (f) s += '-';
  reverse(all(s));
  return O << s;
}
istream &operator>>(istream &I, f128 &x) {
  static string s;
  I >> s, x = stold(s);
  return I;
}
ostream &operator<<(ostream &O, const f128 x) { return O << ld(x); }
template <typename... S>
istream &operator>>(istream &I, tuple<S...> &t) {
  return apply([&I](Z &...s) { ((I >> s), ...); }, t), I;
}
template <typename T, typename U>
istream &operator>>(istream &I, pair<T, U> &x) {
  return I >> x.fi >> x.se;
}
template <typename T, typename U>
ostream &operator<<(ostream &O, const pair<T, U> &x) {
  return O << x.fi << ' ' << x.se;
}
TE requires requires(T &c) { begin(c); end(c); } and 
                          (not is_same_v<decay_t<T>, string>)
istream &operator>>(istream &I, T &c) {
  for (Z &e : c) I >> e;
  return I;
}
TE requires requires(const T &c) { begin(c); end(c); } and 
  (not is_same_v<decay_t<T>, const char*>) and 
  (not is_same_v<decay_t<T>, string>) and 
  (not is_array_v<remove_reference_t<T>> or 
   not is_same_v<remove_extent_t<remove_reference_t<T>>, char>)
ostream &operator<<(ostream &O, const T &a) {
  if (a.empty()) return O;
  Z i = a.begin();
  O << *i++;
  for (; i != a.end(); ++i) O << ' ' << *i;
  return O;
}
void IN() {}
TE void IN(T &x, Z &...s) { cin >> x, IN(s...); }
void print() { cout << '\n'; }
TES void print(T &&x, S &&...y) {
  cout << x;
  if constexpr (sizeof...(S)) cout << ' ';
  print(forward<S>(y)...);
}
void put() {}
TES void put(T &&x, S &&...y) {
  cout << x;
  put(forward<S>(y)...);
}

#define INT(...)  int    __VA_ARGS__; IN(__VA_ARGS__)
#define UINT(...) uint   __VA_ARGS__; IN(__VA_ARGS__)
#define LL(...)   ll     __VA_ARGS__; IN(__VA_ARGS__)
#define ULL(...)  ull    __VA_ARGS__; IN(__VA_ARGS__)
#define I128(...) i128   __VA_ARGS__; IN(__VA_ARGS__)
#define STR(...)  string __VA_ARGS__; IN(__VA_ARGS__)
#define CH(...)   char   __VA_ARGS__; IN(__VA_ARGS__)
#define REAL(...) re     __VA_ARGS__; IN(__VA_ARGS__)
#define VEC(T, a, n) vc<T> a(n); IN(a)

void YES(bool o = 1) { print(o ? "YES" : "NO"); }
void Yes(bool o = 1) { print(o ? "Yes" : "No"); }
void yes(bool o = 1) { print(o ? "yes" : "no"); }
void NO(bool o = 1) { YES(not o); }
void No(bool o = 1) { Yes(not o); }
void no(bool o = 1) { yes(not o); }
void ALICE(bool o = 1) { print(o ? "ALICE" : "BOB"); }
void Alice(bool o = 1) { print(o ? "Alice" : "Bob"); }
void alice(bool o = 1) { print(o ? "alice" : "bob"); }
void BOB(bool o = 1) { ALICE(not o); }
void Bob(bool o = 1) { Alice(not o); }
void bob(bool o = 1) { alice(not o); }
void POSSIBLE(bool o = 1) { print(o ? "POSSIBLE" : "IMPOSSIBLE"); }
void Possible(bool o = 1) { print(o ? "Possible" : "Impossible"); }
void possible(bool o = 1) { print(o ? "possible" : "impossible"); }
void IMPOSSIBLE(bool o = 1) { POSSIBLE(not o); }
void Impossible(bool o = 1) { Possible(not o); }
void impossible(bool o = 1) { possible(not o); }
void TAK(bool o = 1) { print(o ? "TAK" : "NIE"); }
void NIE(bool o = 1) { TAK(not o); }

#if (__cplusplus >= 202002L)
#include <numbers>
constexpr ld pi = numbers::pi_v<ld>;
#endif
TE constexpr T inf = numeric_limits<T>::max();
template <> constexpr i128 inf<i128> = i128(inf<ll>) * 2'000'000'000'000'000'000;
template <typename T, typename U>
constexpr pair<T, U> inf<pair<T, U>> = {inf<T>, inf<U>};

TE constexpr static inline int pc(T x) { return popcount(make_unsigned_t<T>(x)); }
constexpr static inline ll len(const Z &a) { return a.size(); }

void reverse(Z &a) { reverse(all(a)); }

void unique(Z &a) {
  sort(a);
  a.erase(unique(all(a)), a.end());
}
TE vc<int> inverse(const vc<T> &a) {
  int N = len(a);
  vc<int> b(N, -1);
  FOR(i, N) if (a[i] != -1) b[a[i]] = i;
  return b;
}

Z QMAX(const Z &a) { return *max_element(all(a)); }
Z QMIN(const Z &a) { return *min_element(all(a)); }
TE Z QMAX(T l, T r) { return *max_element(l, r); }
TE Z QMIN(T l, T r) { return *min_element(l, r); }
constexpr bool chmax(Z &a, const Z &b) { return (a < b ? a = b, 1 : 0); }
constexpr bool chmin(Z &a, const Z &b) { return (a > b ? a = b, 1 : 0); }

vc<int> argsort(const Z &a) {
  vc<int> I(len(a));
  iota(all(I), 0);
  sort(I, [&](int i, int k) { return a[i] < a[k] or (a[i] == a[k] and i < k); });
  return I;
}
TE vc<T> rearrange(const vc<T> &a, const vc<int> &I) {
  int N = len(I);
  vc<T> b(N);
  FOR(i, N) b[i] = a[I[i]];
  return b;
}
template <int of = 1, typename T> 
vc<T> pre_sum(const vc<T> &a) {
  int N = len(a);
  vc<T> c(N + 1);
  FOR(i, N) c[i + 1] = c[i] + a[i];
  if (of == 0) c.erase(c.begin());
  return c;
}

TE constexpr static int topbit(T x) {
  if (x == 0) return - 1;
  if constexpr (sizeof(T) <= 4) return 31 - __builtin_clz(x);
  else return 63 - __builtin_clzll(x);
}
TE constexpr static int lowbit(T x) {
  if (x == 0) return -1;
  if constexpr (sizeof(T) <= 4) return __builtin_ctz(x);
  else return __builtin_ctzll(x);
}

TE constexpr T floor(T x, T y) { return x / y - (x % y and (x ^ y) < 0); }
TE constexpr T ceil(T x, T y) { return floor(x + y - 1, y); }
TE constexpr T bmod(T x, T y) { return x - floor(x, y) * y; }
TE constexpr pair<T, T> divmod(T x, T y) {
  T q = floor(x, y);
  return pair{q, x - q * y};
}
template <typename T = ll>
T SUM(const Z &v) {
  return accumulate(all(v), T(0));
}
int lb(const Z &a, Z x) { return lower_bound(all(a), x) - a.begin(); }
TE int lb(T l, T r, Z x) { return lower_bound(l, r, x) - l; }
int ub(const Z &a, Z x) { return upper_bound(all(a), x) - a.begin(); }
TE int ub(T l, T r, Z x) { return upper_bound(l, r, x) - l; }

template <bool ck = 1>
ll bina(Z f, ll l, ll r) {
  if constexpr (ck) assert(f(l));
  while (abs(l - r) > 1) {
    ll x = (r + l) >> 1;
    (f(x) ? l : r) = x;
  }
  return l;
}
TE T bina_real(Z f, T l, T r, int c = 100) {
  while (c--) {
    T x = (l + r) / 2;
    (f(x) ? l : r) = x;
  }
  return (l + r) / 2;
}

Z pop(Z &s) {
  if constexpr (requires { s.pop_back(); }) {
    Z x = s.back();
    return s.pop_back(), x;
  } else if constexpr (requires { s.top(); }) {
    Z x = s.top();
    return s.pop(), x;
  } else {
    Z x = s.front();
    return s.pop(), x;
  }
}
void setp(int x) { cout << fixed << setprecision(x); }

TE inline void sh(vc<T> &a, int N, T b = {}) {
  a.resize(N, b);
}

#define FIO

static constexpr uint SZ = 1 << 17;
char ibuf[SZ];
char obuf[SZ];
char out[100];

uint pil = 0, pir = 0, por = 0;

struct Pre {
  char num[10000][4];
  constexpr Pre() : num() {
    for (int i = 0; i < 10000; i++) {
      int n = i;
      for (int j = 3; j >= 0; j--) {
        num[i][j] = n % 10 | '0';
        n /= 10;
      }
    }
  }
} constexpr pre;

inline void load() {
  memcpy(ibuf, ibuf + pil, pir - pil);
  pir = pir - pil + fread(ibuf + pir - pil, 1, SZ - pir + pil, stdin);
  pil = 0;
  if (pir < SZ) ibuf[pir++] = '\n';
}

inline void flush() {
  fwrite(obuf, 1, por, stdout);
  por = 0;
}
inline void rd(char &c) {
  do {
    if (pil + 1 > pir) load();
    c = ibuf[pil++];
  } while (isspace(c));
}

inline void rd(string &x) {
  x.clear();
  char c;
  do {
    if (pil + 1 > pir) load();
    c = ibuf[pil++];
  } while (isspace(c));
  do {
    x += c;
    if (pil == pir) load();
    c = ibuf[pil++];
  } while (!isspace(c));
}

TE inline void rd_real(T &x) {
  string s;
  rd(s);
  x = stod(s);
}

TE inline void rd_integer(T &x) {
  if (pil + 100 > pir) load();
  char c;
  do c = ibuf[pil++];
  while (c < '-');
  bool minus = 0;
  if constexpr (is_signed<T>::value || is_same_v<T, i128>) {
    if (c == '-') {
      minus = 1, c = ibuf[pil++];
    }
  }
  x = 0;
  while ('0' <= c) {
    x = x * 10 + (c & 15), c = ibuf[pil++];
  }
  if constexpr (is_signed<T>::value || is_same_v<T, i128>) {
    if (minus) x = -x;
  }
}

inline void rd(int16_t &x) { rd_integer(x); }
inline void rd(uint16_t &x) { rd_integer(x); }
inline void rd(int &x) { rd_integer(x); }
inline void rd(long &x) { rd_integer(x); }
inline void rd(ll &x) { rd_integer(x); }
inline void rd(i128 &x) { rd_integer(x); }
inline void rd(uint &x) { rd_integer(x); }
inline void rd(ull &x) { rd_integer(x); }
inline void rd(u128 &x) { rd_integer(x); }
inline void rd(double &x) { rd_real(x); }
inline void rd(long double &x) { rd_real(x); }
inline void rd(f128 &x) { rd_real(x); }

template <typename T, typename U>
inline void rd(pair<T, U> &p) {
  return rd(p.fi), rd(p.se);
}
template <size_t N = 0, typename T>
inline void rd_tuple(T &t) {
  if constexpr (N < tuple_size<T>::value) {
    Z &x = get<N>(t);
    rd(x);
    rd_tuple<N + 1>(t);
  }
}
template <typename... T>
inline void rd(tuple<T...> &tpl) {
  rd_tuple(tpl);
}

template <size_t N = 0, typename T>
inline void rd(array<T, N> &x) {
  for (Z &e : x) rd(e);
}
TE inline void rd(vc<T> &x) {
  for (Z &e : x) rd(e);
}

inline void read() {}
template <typename H, typename... T>
inline void read(H &h, T &...t) {
  rd(h), read(t...);
}

inline void wt(const char c) {
  if (por == SZ) flush();
  obuf[por++] = c;
}
inline void wt(const string s) {
  for (char c : s) wt(c);
}
inline void wt(const char *s) {
  size_t len = strlen(s);
  for (size_t i = 0; i < len; i++) wt(s[i]);
}

TE inline void wt_integer(T x) {
  if (por > SZ - 100) flush();
  if (x < 0) {
    obuf[por++] = '-', x = -x;
  }
  int outi;
  for (outi = 96; x >= 10000; outi -= 4) {
    memcpy(out + outi, pre.num[x % 10000], 4);
    x /= 10000;
  }
  if (x >= 1000) {
    memcpy(obuf + por, pre.num[x], 4);
    por += 4;
  } else if (x >= 100) {
    memcpy(obuf + por, pre.num[x] + 1, 3);
    por += 3;
  } else if (x >= 10) {
    int q = (x * 103) >> 10;
    obuf[por] = q | '0';
    obuf[por + 1] = (x - q * 10) | '0';
    por += 2;
  } else
    obuf[por++] = x | '0';
  memcpy(obuf + por, out + outi + 4, 96 - outi);
  por += 96 - outi;
}

TE inline void wt_real(T x) {
  ostringstream oss;
  oss << fixed << setprecision(10) << double(x);
  string s = oss.str();
  wt(s);
}

inline void wt(int x) { wt_integer(x); }
inline void wt(long x) { wt_integer(x); }
inline void wt(ll x) { wt_integer(x); }
inline void wt(i128 x) { wt_integer(x); }
inline void wt(uint x) { wt_integer(x); }
inline void wt(ull x) { wt_integer(x); }
inline void wt(u128 x) { wt_integer(x); }
inline void wt(double x) { wt_real(x); }
inline void wt(long double x) { wt_real(x); }
inline void wt(f128 x) { wt_real(x); }

template <typename T, typename U>
inline void wt(const pair<T, U> &val) {
  wt(val.fi);
  wt(' ');
  wt(val.se);
}
template <size_t N = 0, typename T>
inline void wt_tuple(const T &t) {
  if constexpr (N < tuple_size<T>::value) {
    if constexpr (N > 0) {
      wt(' ');
    }
    const Z x = get<N>(t);
    wt(x);
    wt_tuple<N + 1>(t);
  }
}
template <typename... T>
inline void wt(tuple<T...> &tpl) {
  wt_tuple(tpl);
}
template <typename T, size_t S>
inline void wt(const array<T, S> &val) {
  Z n = val.size();
  for (size_t i = 0; i < n; i++) {
    if (i) wt(' ');
    wt(val[i]);
  }
}
TE inline void wt(const vc<T> &a) {
  int N = len(a);
  FOR(i, N) {
    if (i) wt(' ');
    wt(a[i]);
  }
}
TE inline void wt(const vc<vc<T>> &v) {
  int N = len(v);
  FOR(i, N) {
    wt(v[i]);
    if (i + 1 != N) wt('\n');
  }
}
template <typename T, const size_t s>
inline void wt(const vc<array<T, s>> &v) {
  int N = len(v);
  FOR(i, N) {
    wt(v[i]);
    if (i + 1 != N) wt('\n');
  }
}

inline void __attribute__((destructor)) _d() { flush(); }

inline void println() { wt('\n'); }
template <typename Head, typename... Tail>
inline void println(Head &&head, Tail &&...tail) {
  wt(head);
  if (sizeof...(Tail)) wt(' ');
  println(forward<Tail>(tail)...);
}

#define IN(...) read(__VA_ARGS__)
#define print(...) println(__VA_ARGS__)
#define FLUSH() flush()

#define c constexpr
template <int mod>
struct mint_t {
  using T = mint_t;
  static c uint m = mod;
  uint x;

  c inline uint val() const { return x; }

  c mint_t() : x(0) {}
  TE requires(is_unsigned_v<T>) mint_t(T x) : x(x % m) {}
  mint_t(u128 x) : x(x % m) {}
  TE requires(is_signed_v<T>) mint_t(T x) : x((x %= mod) < 0 ? x + mod : x) {}
  mint_t(i128 x) : x((x %= mod) < 0 ? x + mod : x) {}

  c T &operator+=(T p) {
    if ((x += p.x) >= m) x -= m;
    return *this;
  }
  c T &operator-=(T p) {
    if ((x += m - p.x) >= m) x -= m;
    return *this;
  }
  c T operator+(T p) const { return T(*this) += p; }
  c T operator-(T p) const { return T(*this) -= p; }

  c T &operator*=(T p) {
    x = ull(x) * p.x % m;
    return *this;
  }
  c T operator*(T p) const { return T(*this) *= p; }

  c T &operator/=(T p) { return *this *= p.inv(); }
  c T operator/(T p) const { return T(*this) /= p; }

  c T operator-() const { return T::gen(x ? mod - x : 0); }

  c T inv() const {
    int a = x, b = mod, x = 1, y = 0;
    while (b > 0) {
      int t = a / b;
      swap(a -= t * b, b);
      swap(x -= t * y, y);
    }
    return T(x);
  }

  c T pow(ll k) const {
    if (k < 0) return inv().pow(-k);
    T s(1), a(x);
    for (; k; k >>= 1, a *= a)
      if (k & 1) s *= a;
    return s;
  }

  c bool operator<(T p) const { return x < p.x; }
  c bool operator==(T p) const { return x == p.x; }
  c bool operator!=(T p) const { return x != p.x; }

  static c T gen(uint x) {
    T s;
    s.x = x;
    return s;
  }

  friend istream &operator>>(istream &cin, T &p) {
    ll t;
    cin >> t;
    p = t;
    return cin;
  }
  
  friend ostream &operator<<(ostream &cout, T p) { return cout << p.x; }

  static c int get_mod() { return mod; }

  static c PII ntt_info() {
    if (mod == 167772161) return {25, 17};
    if (mod == 469762049) return {26, 30};
    if (mod == 754974721) return {24, 362};
    if (mod == 998244353) return {23, 31};
    if (mod == 120586241) return {20, 74066978};
    if (mod == 880803841) return {23, 211};
    if (mod == 943718401) return {22, 663003469};
    if (mod == 1004535809) return {21, 582313106};
    if (mod == 1012924417) return {21, 368093570};
    return {-1, -1};
  }
  
  static c bool can_ntt() { return ntt_info().fi != -1; }
};
#undef c

using M99 = mint_t<998244353>;
using M17 = mint_t<1000000007>;
using M11 = M17;

#ifdef FIO
template <int mod>
void rd(mint_t<mod> &x) {
  LL(y);
  x = y;
}
template <int mod>
void wt(mint_t<mod> x) {
  wt(x.x);
}
#endif

template <typename am>
struct segl_t {
  using AM = am;
  using MX = AM::MX;
  using MA = AM::MA;
  using X = MX::X;
  using A = MA::X;
  int N, n, sz;
  vc<X> a;
  vc<A> c;

  segl_t() {}
  segl_t(int N) { build(N, [](int) { return MX::unit(); }); }
  segl_t(int N, Z f) { build(N, f); }
  segl_t(const vc<X> &a) { build(a); }

  void build(const vc<X> &a) {
    build(len(a), [&](int i) { return a[i]; });
  }
  
  void build(int M, Z f) {
    N = M, n = 1;
    while ((1 << n) < N) ++n;
    sz = 1 << n;
    a.assign(sz << 1, MX::unit());
    c.assign(sz, MA::unit());
    FOR(i, N) a[sz + i] = f(i);
    FOR_R(i, 1, sz) upd(i);
  }

  void upd(int k) { a[k] = MX::op(a[k << 1], a[k << 1 | 1]); }

  void app(int k, A f) {
    a[k] = AM::act(a[k], f, 1 << (n - topbit(k)));
    if (k < sz) c[k] = MA::op(c[k], f);
  }

  void push(int k) {
    if (c[k] == MA::unit()) return;
    app(k << 1, c[k]), app(k << 1 | 1, c[k]);
    c[k] = MA::unit();
  }

  void apply(int l, int r, A f) {
    assert(-1 < l);
    assert(l <= r);
    assert(r <= N);
    if (l == r) return;
    l += sz, r += sz;
    FOR_R(i, 1, n + 1) {
      if (((l >> i) << i) != l) push(l >> i);
      if (((r >> i) << i) != r) push((r - 1) >> i);
    }
    int cl = l, cr = r;
    while (l < r) {
      if (l & 1) app(l++, f);
      if (r & 1) app(--r, f);
      l >>= 1, r >>= 1;
    }
    l = cl, r = cr;
    FOR(i, 1, n + 1) {
      if (((l >> i) << i) != l) upd(l >> i);
      if (((r >> i) << i) != r) upd((r - 1) >> i);
    }
  }

  X prod(int l, int r) {
    assert(-1 < l and l < r + 1 and r < N + 1);
    if (l == r) return MX::unit();
    l += sz, r += sz;
    FOR_R(i, 1, n + 1){
      if (((l >> i) << i) != l) push(l >> i);
      if (((r >> i) << i) != r) push((r - 1) >> i);
    }
    X ls = MX::unit(), rs = MX::unit();
    while (l < r) {
      if (l & 1) ls = MX::op(ls, a[l++]);
      if (r & 1) rs = MX::op(a[--r], rs);
      l >>= 1, r >>= 1;
    }
    return MX::op(ls, rs);
  }

  void apply(int x, const A &f) {
    assert(-1 < x and x < N);
    x += sz;
    FOR_R(i, 1, n + 1) push(x >> i);
    a[x] = AM::act(a[x], f, 1);
    FOR(i, 1, n + 1) upd(x >> i);
  }

  void multiply(int x, const X &w) {
    assert(0 <= x and x < N);
    x += sz;
    FOR_R(i, 1, n + 1) push(x >> i);
    a[x] = MX::op(a[x], w);
    FOR(i, 1, n + 1) upd(x >> i);
  }

  void set(int x, X w) {
    assert(-1 < x and x < N);
    x += sz;
    FOR_R(i, 1, n + 1) push(x >> i);
    a[x] = w;
    FOR(i, 1, n + 1) upd(x >> i);
  }

  X get(int x) {
    assert(x > -1 and x < N);
    x += sz;
    FOR_R(i, 1, n + 1) push(x >> i);
    return a[x];
  }

  X prod_all() { return a[1]; }

  int max_right(Z ck, int l) {
    assert(0 <= l and l <= N);
    assert(ck(MX::unit()));
    if (l == N) return N;
    l += sz;
    FOR_R(i, 1, n + 1) push(l >> i);
    X sm = MX::unit();
    do {
      while (l % 2 == 0) l >>= 1;
      if (not ck(MX::op(sm, a[l]))) {
        while (l < sz) {
          push(l);
          l = l << 1;
          if (ck(MX::op(sm, a[l]))) sm = MX::op(sm, a[l++]);
        }
        return l - sz;
      }
      sm = MX::op(sm, a[l++]);
    } while ((l & -l) != l);
    return N;
  }

  int min_left(Z ck, int r) {
    assert(0 <= r and r <= N);
    assert(ck(MX::unit()));
    if (r == 0) return 0;
    r += sz;
    FOR_R(i, 1, n + 1) push((r - 1) >> i);
    X sm = MX::unit();
    do {
      r--;
      while (r > 1 and (r % 2)) r >>= 1;
      if (not ck(MX::op(a[r], sm))) {
        while (r < sz) {
          push(r);
          r = r << 1 | 1;
          if (ck(MX::op(a[r], sm))) sm = MX::op(a[r--], sm);
        }
        return r + 1 - sz;
      }
      sm = MX::op(a[r], sm);
    } while ((r & -r) != r);
    return 0;
  }
};

#include <random>

#ifdef MeIoN
std::mt19937 rg(0);
std::mt19937_64 rd_64(0);
#else
std::mt19937 rg(std::chrono::steady_clock::now().time_since_epoch().count());
std::mt19937_64 rd_64(std::chrono::steady_clock::now().time_since_epoch().count());
#endif

uint rng() { return rg(); }
uint rng(uint lim) { return rg() % lim; }
int rng(int l, int r) { return l + rg() % (r - l); }
ull rng_64() { return rd_64(); }
ull rng_64(ull lim) { return rd_64() % lim; }
ll rng_64(ll l, ll r) { return l + rd_64() % (r - l); }

template <typename T>
void shuffle(vector<T> &v) {
  const int N = len(v);
  FOR(i, 1, N) {
    int k = rng(0, i + 1);
    if (i != k) swap(v[i], v[k]);
  }
}

TE ull hsh(const pair<T, T> &X) {
  static ull B = rng_64();
  if (not B) B = rng_64();
  return B * X.fi + X.se;
}

TE struct hashmap {
  uint ls, msk;
  vc<ull> ke;
  vc<T> val;
  vc<u8> vis;

  ull hash(ull x) const {
    static const ull bs =
        chrono::steady_clock::now().time_since_epoch().count();
    x += bs;
    x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9;
    x = (x ^ (x >> 27)) * 0x94d049bb133111eb;
    return (x ^ (x >> 31)) & msk;
  }

  void extend() {
    vc<pair<ull, T>> dat;
    const int N = len(vis);
    dat.reserve(N / 2 - ls);
    FOR(i, N) if (vis[i]) dat.ep(ke[i], val[i]);
    build(dat.size() << 1);
    for (Z &[a, b] : dat) (*this)[a] = b;
  }

  hashmap(uint N = 0) { build(N); }

  void build(uint N) {
    uint k = 8;
    while (k < (N << 1)) k <<= 1;
    ls = k >> 1, msk = k - 1;
    ke.resize(k);
    val.resize(k);
    vis.assign(k, 0);
  }

  void clear() {
    fill(all(vis), 0);
    ls = (msk + 1) >> 1;
  }

  ll size() const { return vis.size() / 2 - ls; }

  int id(ull k) const {
    int i = hash(k);
    while (vis[i] and ke[i] != k) i = (i + 1) & msk;
    return i;
  }

  T &operator[](ull k) {
    if (ls == 0) extend();
    int i = id(k);
    if (not vis[i]) {
      vis[i] = 1;
      ke[i] = k;
      val[i] = T {};
      --ls;
    }
    return val[i];
  }
  
  T &operator[](PII p) {
    ll k = hsh(p);
    if (ls == 0) extend();
    int i = id(k);
    if (not vis[i]) {
      vis[i] = 1;
      ke[i] = k;
      val[i] = T {};
      --ls;
    }
    return val[i];
  }

  T get(ull k, T fail) const {
    int i = id(k);
    return (vis[i] ? val[i] : fail);
  }

  bool contains(ull k) const {
    int i = id(k);
    return vis[i] and ke[i] == k;
  }

  vc<pair<ull, T>> get_all() const {
    int N = len(vis);
    vc<pair<ull, T>> s;
    FOR(i, N) if (vis[i]) s.ep(ke[i], val[i]);
    return s;
  }

  
  void enumerate_all(Z f) const {
    const int N = len(vis);
    FOR(i, N) if (vis[i]) f(ke[i], val[i]);
  }
};

TE struct edge {
  int f, to;
  T w;
  int id;
};
template <typename T = int, bool dir = 0>
struct graph {
  static constexpr bool is_dir = dir;
  int N, M;
  using cost_type = T;
  using ee = edge<T>;
  vc<ee> es;
  vc<int> in;
  vc<ee> c;
  
  bool ok;

  bool isok() { return ok; }

  struct px {
    const graph *g;
    int l, r;
    px(const graph *g, int l, int r) : g(g), l(l), r(r) {}
    const ee *begin() const {
      if (l == r) return 0;
      return &g->c[l];
    }
    const ee *end() const {
      if (l == r) return 0;
      return &g->c[r];
    }
  };

  px operator[](int i) const {
    assert(ok);
    return {this, in[i], in[i + 1]};
  }

  graph() : N(0), M(0), ok(0) {}
  graph(int N) : N(N), M(0), ok(0) {}

  void add(int f, int t, T w = 1, int i = -1) {
    assert(not ok);
    assert(-1 < f and -1 < t and t < N and f < N);
    if (i == -1) i = M;
    es.ep(ee{f, t, w, i});
    ++M;
  }

  void build() {
    assert(not ok);
    ok = 1;
    in.assign(N + 1, 0);
    for (Z &&e : es) {
      in[e.f + 1]++;
      if (not dir) in[e.to + 1]++;
    }
    FOR(i, N) in[i + 1] += in[i];
    Z cc = in;
    c.resize(in.back() + 1);
    for (Z &&e : es) {
      c[cc[e.f]++] = e;
      if (not dir) c[cc[e.to]++] = {e.to, e.f, e.w, e.id};
    }
  }

  template <bool wt = 0, int of = 1>
  void sc() { sc<wt, of>(N - 1); }
  template <bool wt = 0, int of = 1>
  void sc(int M) {
    es.reserve(M * (dir ? 1 : 2));
    FOR(M) {
      INT(x, y);
      x -= of, y -= of;
      if (not wt) {
        add(x, y);
      } else {
        T w;
        IN(w);
        add(x, y, w);
      }
    }
    build();
  }

  vc<int> deg() {
    vc<int> in(N);
    for (Z &&e : es) ++in[e.f], ++in[e.to];
    return in;
  }

  pair<vc<int>, vc<int>> deg_inout() {
    vc<int> in(N), ou(N);
    for (Z &&e : es) ++in[e.to], ++ou[e.f];
    return {in, ou};
  }

  vc<int> ni;
  vc<u8> vis;
  
  
  
  
  graph<T, dir> rearrange(const vc<int> &v, bool keep_eid = 0) {
    if (len(ni) != N) ni.assign(N, -1);
    int N = len(v);
    FOR(i, N) ni[v[i]] = i;
    graph<T, dir> g(N);
    vc<int> s;
    FOR(i, N) {
      for (Z &&e : (*this)[v[i]]) {
        if (len(vis) <= e.id) vis.resize(e.id + 1);
        if (vis[e.id]) continue;
        int f = e.f, to = e.to;
        if (ni[f] != -1 and ni[to] != -1) {
          s.ep(e.id);
          vis[e.id] = 1;
          int id = (keep_eid ? e.id : -1);
          g.add(ni[f], ni[to], e.w, id);
        }
      }
    }
    FOR(i, N) ni[v[i]] = -1;
    for (int i : s) vis[i] = 0;
    return g.build(), g;
  }

  ull has(ull x, ull y) {
    if (not dir and x > y) swap(x, y);
    return x * N + y;
  }

  hashmap<int> mp;
  int get_eid(ull x, ull y) {
    if (mp.size() == 0) {
      mp.build(N - 1);
      for (Z &&e : es) {
        ull x = e.f, y = e.to;
        ull k = has(x, y);
        mp[k] = e.id;
      }
    }
    return mp.get(has(x, y), -1);
  }

  graph rev() const requires(dir) {
    graph ng(N);
    for (Z &&[f, t, w, id] : es) ng.add(t, f, w, id);
    return ng;
  }
};

TE struct hld {
  using G = graph<T, 0>;
  G &g;
  int N, t = 0;
  vc<int> L, R, hd, V, fa, to, d;

  hld(G &g, int r = 0)
      : g(g), N(g.N), L(N, -1), R(L), hd(N, r), V(L), fa(L), to(L), d(N) {
    if (r == -1) return;
    assert(g.isok());
    dfs(r, -1);
    hl(r, r);
  }

  void dfs(int n, int f) {
    fa[n] = f;
    R[n] = 1;
    int l = g.in[n], r = g.in[n + 1], m = 0;
    Z &c = g.c;
    if (r - l > 1 and c[l].to == f) swap(c[l], c[l + 1]);
    FOR(i, l, r) if (c[i].to != f) {
      Z e = c[i];
      to[e.to] = e.id;
      d[e.to] = d[n] + 1;
      dfs(e.to, n);
      R[n] += R[e.to];
      if (chmax(m, R[e.to]) and l < i) swap(c[l], c[i]);
    }
  }

  void hl(int n, int p) {
    R[n] += L[n] = t;
    V[t++] = n;
    bool f = 1;
    for (Z &&e : g[n]) if (e.to != p) {
      hd[e.to] = f ? hd[n] : e.to;
      f = 0;
      hl(e.to, n);
    }
  }

  
  vc<int> hp(int n) {
    vc<int> s{n};
    while (1) {
      int x = hc(s.back());
      if (x == -1 or hd[x] != n) return s;
      s.ep(x);
    }
  }
  
  inline int hc(int x) {
    int i = L[x] + 1;
    if (i == N) return -1;
    int a = V[i];
    return fa[a] == x ? a : -1;
  }

  
  int ev(int i) {
    Z &e = g.es[i];
    return (fa[e.f] == e.to ? e.f : e.to);
  }
  
  int ve(int x) { return to[x]; }

  
  int gei(int x, int y) {
    if (fa[x] != y) swap(x, y);
    assert(fa[x] == y);
    return to[x];
  }

  int el(int i) { return 2 * L[i] - d[i]; }
  int er(int i) { return 2 * R[i] - d[i] - 1; }

  
  int la(int n, int k) {
    assert(k <= d[n]);
    while (1) {
      int x = hd[n];
      if (L[n] - k >= L[x]) return V[L[n] - k];
      k -= L[n] - L[x] + 1;
      n = fa[x];
    }
  }

  int lca(int x, int y) {
    for (;; y = fa[hd[y]]) {
      if (L[x] > L[y]) swap(x, y);
      if (hd[x] == hd[y]) return x;
    }
  }

  int dist(int a, int b) { return d[a] + d[b] - 2 * d[lca(a, b)]; }

  int meet(int a, int b, int c) { return lca(a, b) ^ lca(a, c) ^ lca(b, c); }

  
  bool ins(int x, int y) { return L[y] <= L[x] and L[x] < R[y]; }

  
  int jump(int x, int y, int k) {
    if (k == 1) {
      if (x == y) return -1;
      return ins(y, x) ? la(y, d[y] - d[x] - 1) : fa[x];
    }
    int c = lca(x, y);
    int a = d[x] - d[c];
    int b = d[y] - d[c];
    if (k > a + b) return -1;
    if (k <= a) return la(x, k);
    return la(y, a + b - k);
  }

  int size(int x, int r = -1) {
    if (r == -1) return R[x] - L[x];
    if (x == r) return N;
    int y = jump(x, r, 1);
    if (ins(x, y)) return R[x] - L[x];
    return N - R[y] + L[y];
  }

  vc<int> size_arr(int r = -1) {
    vc<int> sz(N);
    FOR(i, N) sz[i] = size(i, r);
    return sz;
  }

  vc<int> cc(int n) { 
    vc<int> s;
    for (Z &&e : g[n]) if (e.to != fa[n]) s.ep(e.to);
    return s;
  }

  vc<int> cl(int n) { 
    vc<int> s;
    bool f = 1;
    for (Z &&e : g[n]) {
      if (e.to != fa[n]) {
        if (not f) s.ep(e.to);
        f = 0;
      }
    }
    return s;
  }

  
  vc<PII> dec(int x, int y, bool e) {
    vc<PII> a, b;
    while (1) {
      if (hd[x] == hd[y]) break;
      if (L[x] < L[y]) {
        b.ep(L[hd[y]], L[y]);
        y = fa[hd[y]];
      } else {
        a.ep(L[x], L[hd[x]]);
        x = fa[hd[x]];
      }
    }
    if (L[x] < L[y]) b.ep(L[x] + e, L[y]);
    else if (L[y] + e <= L[x]) a.ep(L[x], L[y] + e);
    reverse(b);
    a.insert(a.end(), all(b));
    return a;
  }

  
  vc<int> rest_path(int x, int y) {
    vc<int> s;
    for (Z [a, b] : dec(x, y, 0)) {
      if (a <= b) FOR(i, a, b + 1) s.ep(V[i]);
      else FOR_R(i, b, a + 1) s.ep(V[i]);
    }
    return s;
  }

  
  
  PII cross(int a, int b, int c, int d) {
    int ab = lca(a, b), ac = lca(a, c), ad = lca(a, d);
    int bc = lca(b, c), bd = lca(b, d), cd = lca(c, d);
    int x = ab ^ ac ^ bc, y = ab ^ ad ^ bd;

    if (x != y) return {x, y};
    int z = ac ^ ad ^ cd;
    if (x != z) x = -1;
    return {x, x};
  }

  
  int max_path(Z f, int x, int y) {
    if (not f(x)) return -1;
    for (Z [a, b] : dec(x, y, 0)) {
      if (not f(V[a])) return x;
      if (f(V[b])) {
        x = V[b];
        continue;
      }
      int c = bina<0>([&](int c) -> bool { return f(V[c]); }, a, b);
      return V[c];
    }
    return x;
  }
};

template <typename T, typename mono, bool E>
struct hld_mono_lazy_commute {
  using AM = mono;
  using MX = AM::MX;
  using MA = AM::MA;
  using X = MX::X;
  using A = MA::X;
  hld<T> &t;
  vc<int> &hd, &fa, &L;
  int N;
  segl_t<AM> sa;

  hld_mono_lazy_commute(hld<T> &t) : t(t), hd(t.hd), fa(t.fa), L(t.L), N(t.N) {
    build([&](int) { return MX::unit(); });
  }
  hld_mono_lazy_commute(hld<T> &t, vc<X> &a) : t(t), hd(t.hd), fa(t.fa), L(t.L), N(t.N) {
    build([&](int i) { return a[i]; });
  }
  hld_mono_lazy_commute(hld<T> &t, Z f) : t(t), hd(t.hd), fa(t.fa), L(t.L), N(t.N) {
    build(f);
  }

  void build(Z f) {
    sa.build(N, [&](int i) {
      return not E ? f(t.V[i]) : i ? f(t.ve(t.V[i])) : MX::unit();
    });
  }

  inline X f(int x, int y) { return sa.prod(min(x, y), max(x, y) + 1); }

  X prod(int x, int y) {
    X s = MX::unit();
    while (hd[x] != hd[y]) {
      if (L[x] < L[y]) swap(x, y);
      s = MX::op(s, f(L[hd[x]], L[x]));
      x = fa[hd[x]];
    }
    if (L[x] < L[y]) s = MX::op(s, f(L[x] + E, L[y]));
    else if (L[y] + E <= L[x]) s = MX::op(s, f(L[x], L[y] + E));
    return s;
  }
  X prod_sub(int x) { return sa.prod(t.L[x] + E, t.R[x]); }
  X prod_sub(int x, int rt) {
    if (rt == x) return prod_all();
    if (not t.ins(rt, x)) {
      int l = t.L[x], r = t.R[x];
      return sa.prod(l + E, r);
    }
    x = t.jump(x, rt, 1);
    int L = t.L[x], R = t.R[x];
    return MX::op(sa.prod(0, L), sa.prod(R, N));
  }
  X prod_all() { return prod_sub(t.V[0]); }

  void apply(int x, int y, A f) {
    for (Z [l, r] : t.dec(x, y, E)) {
      if (l > r) swap(l, r);
      sa.apply(l, r + 1, f);
    }
  }
  void apply_sub(int x, A f) {
    int l = t.L[x], r = t.R[x];
    sa.apply(l + E, r, f);
  }
  void apply_out(int x, A f) {
    int l = t.L[x], r = t.R[x];
    sa.apply(E, l + E, f);
    sa.apply(r, N, f);
  }

  inline int ts(int i) {
    if (E) i = t.ev(i);
    return t.L[i];
  }

  void set(int i, X x) { sa.set(ts(i), x); }

  void multiply(int i, X x) { sa.multiply(ts(i), x); }

  void apply(int i, A f) { sa.apply(ts(i), f); }

  X get(int i) { return sa.get(ts(i)); }

  vc<X> get_all() {
    vc<X> dat = sa.get_all(), s(N - E);
    FOR(i, N - E) s[i] = dat[ts(i)];
    return s;
  }

  
  int max_path(Z ck, int x, int y) {
    if (E) return max_re(ck, x, y);
    if (not ck(prod(x, x))) return - 1;
    X s = MX::unit();
    for (Z &&[a, b] : t.dec(x, y, E)) {
      X w = f(a, b);
      if (ck(MX::op(s, w))) {
        s = MX::op(s, w);
        x = t.V[b];
        continue;
      }
      Z ckt = [&](X x) -> bool { return ck(MX::op(s, x)); };
      if (a <= b) {
        int i = sa.max_right(ckt, a);
        return(i == a ? x : t.V[i - 1]);
      } else {
        int i = sa.min_left(ckt, a + 1);
        if (i == a + 1) return x;
        return t.V[i];
      }
    }
    return y;
  }

  int max_re(Z ck, int x, int y) {
    static_assert(E);
    if (not ck(MX::unit())) return -1;
    int fa = t.lca(x, y);
    X s = MX::unit();
    for (Z [a, b] : t.dec(x, fa, E)) {
      X w = f(a, b);
      if (ck(MX::op(s, w))) {
        s = MX::op(s, w);
        x = fa[t.V[b]];
        continue;
      }
      Z ckt = [&](X x) -> bool { return ck(MX::op(s, x)); };
      int i = sa.min_left(ckt, a + 1);
      if (i == a + 1) return x;
      return fa[t.V[i]];
    }
    for (Z [a, b] : t.dec(fa, y, E)) {
      X x = f(a, b);
      if (ck(MX::op(s, x))) {
        s = MX::op(s, x);
        x = (t.V[b]);
        continue;
      }
      Z ckt = [&](X x) -> bool { return ck(MX::op(s, x)); };
      Z i = sa.max_right(ckt, a);
      return(i == a ? x : t.V[i - 1]);
    }
    return y;
  }
};

template <typename T, typename mono, bool E>
struct hld_mono_lazy_nc {
  using AM = mono;
  using MX = AM::MX;
  using MA = AM::MA;
  using X = MX::X;
  using A = MA::X;
  hld<T> &t;
  int N;
  segl_t<AM> sa, sb;

  hld_mono_lazy_nc(hld<T> &t) : t(t), N(t.N) {
    build([](int) -> X { return MX::unit(); });
  }
  hld_mono_lazy_nc(hld<T> &t, vc<X> &a) : t(t), N(t.N) {
    build([&](int i) -> X { return a[i]; });
  }
  hld_mono_lazy_nc(hld<T> &t, Z f) : t(t), N(t.N) { build(f); }

  void build(Z f) {
    Z g = [&](int i) {
      return not E ? f(t.V[i]) : i ? f(t.ve(t.V[i])) : MX::unit();
    };
    sa.build(N, g);
    sb.build(N, [&](int i) { return g(N - i - 1); });
  }

  inline X f(int x, int y) {
    return x <= y ? sa.prod(x, y + 1) : sb.prod(N - x - 1, N - y);
  }

  X prod(int x, int y) {
    X s = MX::unit();
    for (Z &&[a, b] : t.dec(x, y, E)) s = MX::op(s, f(a, b));
    return s;
  }

  void apply(int x, int y, A f) {
    for (Z [l, r] : t.dec(x, y, E)) {
      if (l > r) swap(l, r);
      sa.apply(l, r + 1, f);
    }
  }
  void apply_sub(int x, A f) {
    int l = t.L[x], r = t.R[x];
    sa.apply(l + E, r, f);
  }
  void apply_out(int x, A f) {
    int l = t.L[x], r = t.R[x];
    sa.apply(E, l + E, f);
    sa.apply(r, N, f);
  }

  inline int ts(int i) {
    if (E) i = t.ev(i);
    return t.L[i];
  }

  void set(int i, X x) { sa.set(ts(i), x); }

  void multiply(int i, X x) { sa.multiply(ts(i), x); }

  void apply(int i, A f) { sa.apply(ts(i), f); }

  X get(int i) { return sa.get(ts(i)); }

  vc<X> get_all() {
    vc<X> dat = sa.get_all(), s(N - E);
    FOR(i, N - E) s[i] = dat[ts(i)];
    return s;
  }

  
  int max_path(Z ck, int x, int y) {
    if (E) return max_path_edge(ck, x, y);
    if (not ck(prod(x, x))) return - 1;
    Z pd = t.dec(x, y, E);
    X s = MX::unit();
    for (Z &&[a, b] : pd) {
      X w = f(a, b);
      if (ck(MX::op(s, w))) {
        s = MX::op(s, w);
        x = (t.V[b]);
        continue;
      }
      Z ckt = [&](X x) -> bool { return ck(MX::op(s, x)); };
      if (a <= b) {
        Z i = sa.max_right(ckt, a);
        return(i == a ? x : t.V[i - 1]);
      } else {
        int i = sb.min_left(ckt, a + 1);
        if (i == a + 1) return x;
        return t.V[i];
      }
    }
    return y;
  }

  int max_path_edge(Z ck, int x, int y) {
    static_assert(E);
    if (not ck(MX::unit())) return -1;
    int fa = t.lca(x, y);
    X s = MX::unit();
    for (Z [a, b] : t.dec(x, fa, E)) {
      X w = f(a, b);
      if (ck(MX::op(s, w))) {
        s = MX::op(s, w);
        x = (t.fa[t.V[b]]);
        continue;
      }
      Z ckt = [&](X x) -> bool { return ck(MX::op(s, x)); };
      int i = sb.min_left(ckt, a + 1);
      if (i == a + 1) return x;
      return t.fa[t.V[i]];
    }
    for (Z [a, b] : t.dec(fa, y, E)) {
      X x = f(a, b);
      if (ck(MX::op(s, x))) {
        s = MX::op(s, x);
        x = (t.V[b]);
        continue;
      }
      Z ckt = [&](X x) -> bool { return ck(MX::op(s, x)); };
      Z i = sa.max_right(ckt, a);
      return(i == a ? x : t.V[i - 1]);
    }
    return y;
  }
};

template <typename T, typename mono, bool E = 0>
using hld_mono_laz = conditional_t<mono::MX::commute, hld_mono_lazy_commute<T, mono, E>,
    hld_mono_lazy_nc<T, mono, E>>;

using mint = M11;
struct MX {
  struct X {
    mint s, c;
  };
  static X op(const X &a, const X &b) { return {a.s + b.s, a.c + b.c}; }
  static X unit() { return {}; }
  static constexpr bool commute = 1;
};
struct MA {
  using X = mint;
  static X op(X a, X b) { return a + b; }
  static X unit() { return 0; }
  static constexpr bool commute = 1;
};
struct AM {
  using MX = ::MX;
  using X = MX::X;
  using MA = ::MA;
  using A = MA::X;
  static X act(X a, A b, ll) { return {a.s + a.c * b, a.c}; }
};
void Yorisou() {
  INT(N);
  VEC(mint, a, N);
  VEC(mint, b, N);
  graph g(N);
  g.sc();
  hld v(g);
  hld_mono_laz<int, AM> ds(v, [&](int i) { return MX::X{a[i], b[i]}; });

  INT(Q);
  FOR(Q) {
    INT(op, x, y);
    --x, --y;
    if (op == 0) {
      INT(w);
      ds.apply(x, y, w);
    } else {
      print(ds.prod(x, y).s);
    }
  }
}
constexpr int tests = 0, fl = 0, DB = 10;
int main() {
  cin.tie(0)->sync_with_stdio(0);
  int T = 1;
  if (fl) cerr.tie(0);
  if (tests and not fl) IN(T);
  for (int i = 0; i < T or fl; ++i) {
    Yorisou();
    if (fl and i % DB == 0) cerr << "Case: " << i << '\n';
  }
  return 0;
}