#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
using ull = unsigned long long;
using uint = unsigned;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
using pdd = pair<ld, ld>;
using tuplis = array<ll, 3>;
template<class T> using pq = priority_queue<T, vector<T>, greater<T>>;
const ll LINF=0x1fffffffffffffff;
const ll MINF=0x7fffffffffff;
const int INF=0x3fffffff;
const int MOD=1000000007;
const int MODD=998244353;
const ld DINF=numeric_limits<ld>::infinity();
const ld EPS=1e-9;
const ld PI=3.1415926535897932;
const ll dx[] = {0, 1, 0, -1, 1, -1, 1, -1};
const ll dy[] = {1, 0, -1, 0, 1, 1, -1, -1};
#define overload5(a,b,c,d,e,name,...) name
#define overload4(a,b,c,d,name,...) name
#define overload3(a,b,c,name,...) name
#define rep1(n) for(ll i=0;i<n;++i)
#define rep2(i,n) for(ll i=0;i<n;++i)
#define rep3(i,a,b) for(ll i=a;i<b;++i)
#define rep4(i,a,b,c) for(ll i=a;i<b;i+=c)
#define rep(...) overload4(__VA_ARGS__,rep4,rep3,rep2,rep1)(__VA_ARGS__)
#define rrep1(n) for(ll i=n;i--;)
#define rrep2(i,n) for(ll i=n;i--;)
#define rrep3(i,a,b) for(ll i=b;i-->(a);)
#define rrep4(i,a,b,c) for(ll i=(a)+((b)-(a)-1)/(c)*(c);i>=(a);i-=c)
#define rrep(...) overload4(__VA_ARGS__,rrep4,rrep3,rrep2,rrep1)(__VA_ARGS__)
#define each1(i,a) for(auto&&i:a)
#define each2(x,y,a) for(auto&&[x,y]:a)
#define each3(x,y,z,a) for(auto&&[x,y,z]:a)
#define each4(w,x,y,z,a) for(auto&&[w,x,y,z]:a)
#define each(...) overload5(__VA_ARGS__,each4,each3,each2,each1)(__VA_ARGS__)
#define all1(i) begin(i),end(i)
#define all2(i,a) begin(i),begin(i)+a
#define all3(i,a,b) begin(i)+a,begin(i)+b
#define all(...) overload3(__VA_ARGS__,all3,all2,all1)(__VA_ARGS__)
#define rall1(i) rbegin(i),rend(i)
#define rall2(i,a) rbegin(i),rbegin(i)+a
#define rall3(i,a,b) rbegin(i)+a,rbegin(i)+b
#define rall(...) overload3(__VA_ARGS__,rall3,rall2,rall1)(__VA_ARGS__)
#define sum(...) accumulate(all(__VA_ARGS__),0LL)
#define dsum(...) accumulate(all(__VA_ARGS__),0.0L)
#define Msum(...) accumulate(all(__VA_ARGS__),mint{})
#define elif else if
#define INT(...) int __VA_ARGS__;in(__VA_ARGS__)
#define LL(...) ll __VA_ARGS__;in(__VA_ARGS__)
#define ULL(...) ull __VA_ARGS__;in(__VA_ARGS__)
#define STR(...) string __VA_ARGS__;in(__VA_ARGS__)
#define CHR(...) char __VA_ARGS__;in(__VA_ARGS__)
#define DBL(...) double __VA_ARGS__;in(__VA_ARGS__)
#define LD(...) ld __VA_ARGS__;in(__VA_ARGS__)
#define vec(type,name,...) vector<type>name(__VA_ARGS__)
#define VEC(type,name,size) vector<type>name(size);in(name)
#define vv(type,name,h,...) vector name(h,vector<type>(__VA_ARGS__))
#define VV(type,name,h,w) vector name(h,vector<type>(w));in(name)
#define vvv(type,name,h,w,...) vector name(h,vector(w,vector<type>(__VA_ARGS__)))
template<class T> auto min(const T& a){ return *min_element(all(a)); }
template<class T> auto max(const T& a){ return *max_element(all(a)); }
template<class T, class U> ll count(const T& a, const U& b){ return count(all(a), b); }
template<class T, class F> ll count_if(const T& a, F b){ return count_if(all(a), b); }
template<class T, class F> void filter(T& a, F b){ a.erase(remove_if(all(a), not_fn(b)), a.end()); }
template<class T, class F = less<>> void sor(T& a, F b = F{}){ sort(all(a), b); }
template<class T> void rev(T& a){ reverse(all(a)); }
template<class T> void uniq(T& a){ sor(a); a.erase(unique(all(a)), end(a)); }
ll popcnt(ull a){ return __builtin_popcountll(a); }
ll intpow(ll a, ll b){ ll ans = 1; while(b){ if(b & 1) ans *= a; a *= a; b /= 2; } return ans; }
ll modpow(ll a, ll b, ll p){ ll ans = 1; while(b){ if(b & 1) (ans *= a) %= p; (a *= a) %= p; b /= 2; } return ans; }
template<class T> T div_floor(T a, T b) { return a / b - ((a ^ b) < 0 && a % b); }
template<class T> T div_ceil(T a, T b) { return a / b + ((a ^ b) > 0 && a % b); }
template<class T> bool chmin(T& a, const T& b){ if(a <= b) return 0; a = b; return 1; }
template<class T> bool chmax(T& a, const T& b){ if(a >= b) return 0; a = b; return 1; }
template<class T, class U> bool chmin(T& a, const U& b){ return chmin(a, (T)b); }
template<class T, class U> bool chmax(T& a, const U& b){ return chmax(a, (T)b); }
vector<ll> iota(ll n, ll begin = 0){ vector<ll> a(n); iota(a.begin(), a.end(), begin); return a; }
vector<pll> factor(ull x){ vector<pll> ans; for(ull i = 2; i * i <= x; i++) if(x % i == 0){ ans.push_back({i, 1}); while((x /= i) % i == 0) ans.back().second++; } if(x != 1) ans.push_back({x, 1}); return ans; }
vector<ll> divisor(ull x){ vector<ll> ans; for(ull i = 1; i * i <= x; i++) if(x % i == 0) ans.push_back(i); rrep(ans.size() - (ans.back() * ans.back() == x)) ans.push_back(x / ans[i]); return ans; }
template<class T> unordered_map<T, ll> press(vector<T> a){ uniq(a); unordered_map<T, ll> ans; rep(a.size()) ans[a[i]] = i; return ans; }
template<class T> auto run_press(const T& a){ vector<pair<decay_t<decltype(a[0])>, ll>> ans; each(x, a){ if(ans.empty() || ans.back().first != x) ans.emplace_back(x, 1); else ans.back().second++; } return ans; }
template<class... Ts> void in(Ts&... t);
[[maybe_unused]] void print(){}
template<class T, class... Ts> void print(const T& t, const Ts&... ts);
template<class... Ts> void out(const Ts&... ts){ print(ts...); cout << '\n'; }
namespace IO{
#define VOID(a) decltype(void(a))
struct S{ S(){ cin.tie(nullptr)->sync_with_stdio(0); fixed(cout).precision(12); } }S;
template<int I> struct P : P<I-1>{};
template<> struct P<0>{};
template<class T> void i(T& t){ i(t, P<3>{}); }
void i(vector<bool>::reference t, P<3>){ int a; i(a); t = a; }
template<class T> auto i(T& t, P<2>) -> VOID(cin >> t){ cin >> t; }
template<class T> auto i(T& t, P<1>) -> VOID(begin(t)){ for(auto&& x : t) i(x); }
template<class T, size_t... idx> void ituple(T& t, index_sequence<idx...>){ in(get<idx>(t)...); }
template<class T> auto i(T& t, P<0>) -> VOID(tuple_size<T>{}){ ituple(t, make_index_sequence<tuple_size<T>::value>{}); }
template<class T> void o(const T& t){ o(t, P<4>{}); }
template<size_t N> void o(const char (&t)[N], P<4>){ cout << t; }
template<class T, size_t N> void o(const T (&t)[N], P<3>){ o(t[0]); for(size_t i = 1; i < N; i++){ o(' '); o(t[i]); } }
template<class T> auto o(const T& t, P<2>) -> VOID(cout << t){ cout << t; }
template<class T> auto o(const T& t, P<1>) -> VOID(begin(t)){ bool first = 1; for(auto&& x : t) { if(first) first = 0; else o(' '); o(x); } }
template<class T, size_t... idx> void otuple(const T& t, index_sequence<idx...>){ print(get<idx>(t)...); }
template<class T> auto o(T& t, P<0>) -> VOID(tuple_size<T>{}){ otuple(t, make_index_sequence<tuple_size<T>::value>{}); }
#undef VOID
}
#define unpack(a) (void)initializer_list<int>{(a, 0)...}
template<class... Ts> void in(Ts&... t){ unpack(IO::i(t)); }
template<class T, class... Ts> void print(const T& t, const Ts&... ts){ IO::o(t); unpack(IO::o((cout << ' ', ts))); }
#undef unpack
#ifdef DEBUG
ll __lg(ull x){ return 63 - __builtin_clzll(x); }
#define debug(...) { print(#__VA_ARGS__); print(":"); out(__VA_ARGS__); }
#else
#define debug(...) void(0)
#endif
#define YESNO(yes,no) void yes(bool i = 1){ out(i?#yes:#no); } void no(){ out(#no); }
YESNO(first, second)
YESNO(First, Second)
YESNO(Yes, No)
YESNO(YES, NO)
YESNO(possible, impossible)
YESNO(Possible, Impossible)
YESNO(POSSIBLE, IMPOSSIBLE)
void Case(ll i){ print("Case #"); print(i); print(": "); }


template<uint32_t m> class static_modint {
    using mint = static_modint;
    uint32_t _v = 0;
    static constexpr bool prime = []() -> bool {
        if (m == 1) return 0;
        if (m == 2 || m == 7 || m == 61) return 1;
        if (m % 2 == 0) return 0;
        uint32_t d = m - 1;
        while (d % 2 == 0) d /= 2;
        for (uint32_t a : {2, 7, 61}) {
            uint32_t t = d;
            mint y = mint(a).pow(t);
            while (t != m - 1 && y != 1 && y != m - 1) {
                y *= y; t <<= 1;
            }
            if (y != m - 1 && t % 2 == 0) return 0;
        }
        return 1;
    }();
    static constexpr pair<int32_t, int32_t> inv_gcd(int32_t a, int32_t b) {
        if (a == 0) return {b, 0};
        int32_t s = b, t = a, m0 = 0, m1 = 1;
        while (t) {
            const int32_t u = s / t;
            s -= t * u; m0 -= m1 * u;
            swap(s, t); swap(m0, m1);
        }
        if (m0 < 0) m0 += b / s;
        return {s, m0};
    }
public:
    static constexpr mint raw(uint32_t v) { mint a; a._v = v; return a; }
    constexpr static_modint() {}
    template <class T>
    constexpr static_modint(T v) {
        static_assert(is_integral_v<T>, "T is not integral type.");
        if constexpr (is_signed_v<T>) {
            int64_t x = int64_t(v % int64_t(m));
            if (x < 0) x += m; _v = uint32_t(x);
        }
        else _v = uint32_t(v % m);
    }
    static constexpr uint32_t mod() { return m; }
    constexpr uint32_t val() const { return _v; }
    constexpr mint& operator++() { return *this += 1; }
    constexpr mint& operator--() { return *this -= 1; }
    constexpr mint operator++(int) { mint res = *this; ++*this; return res; }
    constexpr mint operator--(int) { mint res = *this; --*this; return res; }
    constexpr mint& operator+=(mint rhs) {
        if (_v >= m - rhs._v) _v -= m;
        _v += rhs._v; return *this;
    }
    constexpr mint& operator-=(mint rhs) {
        if (_v < rhs._v) _v += m;
        _v -= rhs._v; return *this;
    }
    constexpr mint& operator*=(mint rhs) { return *this = *this * rhs; }
    constexpr mint& operator/=(mint rhs) { return *this *= rhs.inv(); }
    constexpr mint operator+() const { return *this; }
    constexpr mint operator-() const { return mint{} - *this; }
    constexpr mint pow(long long n) const {
        assert(0 <= n);
        if(n == 0) return 1;
        mint x = *this, r = 1;
        while (1) {
            if (n & 1) r *= x; n >>= 1;
            if (n == 0) return r;
            x *= x;
        }
    }
    constexpr mint inv() const {
        if constexpr (prime) {
            assert(_v);
            return pow(m - 2);
        } else {
            auto eg = inv_gcd(_v, m);
            assert(eg.first == 1);
            return eg.second;
        }
    }
    friend constexpr mint operator+(mint lhs, mint rhs) { return lhs += rhs; }
    friend constexpr mint operator-(mint lhs, mint rhs) { return lhs -= rhs; }
    friend constexpr mint operator*(mint lhs, mint rhs) { return uint64_t(lhs._v) * rhs._v; }
    friend constexpr mint operator/(mint lhs, mint rhs) { return lhs /= rhs; }
    friend constexpr bool operator==(mint lhs, mint rhs) { return lhs._v == rhs._v; }
    friend constexpr bool operator!=(mint lhs, mint rhs) { return lhs._v != rhs._v; }
};
using mint = static_modint<MODD>;
istream& operator>>(istream& in, mint& x) { long long a; in >> a; x = a; return in; }
ostream& operator<<(ostream& out, mint x) { return out << x.val(); }
constexpr mint operator""_M(unsigned long long x) { return x; }

constexpr uint32_t fact_mx = min<uint32_t>(1e6, mint::mod() - 1);
mint fac[fact_mx + 1], inv[fact_mx + 1];
struct factorial {
    factorial() {
        fac[0] = 1;
        for(uint32_t i = 1; i <= fact_mx; i++) fac[i] = fac[i - 1] * mint::raw(i);
        inv[fact_mx] = fac[fact_mx].inv();
        for(uint32_t i = fact_mx; i; i--) inv[i - 1] = inv[i] * mint::raw(i);
    }
} factorial;
mint inverse(long long n) { return inv[n] * fac[n - 1]; }
mint perm(long long n, long long r) {
    if(n < r || r < 0) return 0;
    if(n > fact_mx) [[unlikely]] {
        mint ans = 1, x = n;
        while(r--) ans *= x--;
        return ans;
    }
    return fac[n] * inv[n - r];
}
mint comb(long long n, long long r) {
    if(n < r || r < 0) return 0;
    r = min(r, n - r);
    const mint ans = perm(n, r);
    return ans * inv[r];
}
template<class... T> mint comb(long long n, T... rs) {
    if(n < 0) return 0;
    mint ans = fac[n];
    long long rn = n;
    for(long long r : {rs...}) {
        if(r < 0) return 0;
        ans *= inv[r];
        rn -= r;
    }
    if(rn < 0) return 0;
    return ans * inv[rn];
}
mint Mcomb(long long n, long long r){ return comb(n + r - 1, r); } // r balls into n boxes
int main(){
    LL(n,k);
    if(n==1){
        out(vector{1,1,3,3,3,1,1}[k]);
        return 0;
    }
    mint ans=0;
    ans+=comb(2*n+4,k);
    if(n%2==0){
        k/=2;
        ans+=3*comb(n+2,k);
    }
    else{
        k/=2;
        ans+=2*comb(n+1,k);
    }
    out(ans/4);
}