#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define repn(i, m, n) for (int i = m; i < (int)(n); i++)

#define all(v) v.begin(), v.end()
#define debug(x) cerr << #x << ": " << x << endl;

using Graph = vector<vector<int>>; // グラフ型

template <class T>
bool chmin(T &a, T b)
{
  if (a > b)
  {
    a = b;
    return true;
  }
  else
    return false;
}

// 定数
#define INF32 2147483647          // 2.147483647×10^{9}:32bit整数のinf
#define INF64 9223372036854775807 // 9.223372036854775807×10^{18}:64bit整数のinf
const ll INF = 1LL << 60;
// const int MOD = 1e9 + 7;
const int MOD = 1000000007;

// 大きい順にソートさせる比較関数を直接渡す
//  sort(v.begin(), v.end(), [](int a, int b) { return a > b; });

// modint: mod 計算を int を扱うように扱える構造体
template <int MOD>
struct Fp
{
  long long val;
  constexpr Fp(long long v = 0) noexcept : val(v % MOD)
  {
    if (val < 0)
      val += MOD;
  }
  constexpr int getmod() { return MOD; }
  constexpr Fp operator-() const noexcept
  {
    return val ? MOD - val : 0;
  }
  constexpr Fp operator+(const Fp &r) const noexcept { return Fp(*this) += r; }
  constexpr Fp operator-(const Fp &r) const noexcept { return Fp(*this) -= r; }
  constexpr Fp operator*(const Fp &r) const noexcept { return Fp(*this) *= r; }
  constexpr Fp operator/(const Fp &r) const noexcept { return Fp(*this) /= r; }
  constexpr Fp &operator+=(const Fp &r) noexcept
  {
    val += r.val;
    if (val >= MOD)
      val -= MOD;
    return *this;
  }
  constexpr Fp &operator-=(const Fp &r) noexcept
  {
    val -= r.val;
    if (val < 0)
      val += MOD;
    return *this;
  }
  constexpr Fp &operator*=(const Fp &r) noexcept
  {
    val = val * r.val % MOD;
    return *this;
  }
  constexpr Fp &operator/=(const Fp &r) noexcept
  {
    long long a = r.val, b = MOD, u = 1, v = 0;
    while (b)
    {
      long long t = a / b;
      a -= t * b;
      swap(a, b);
      u -= t * v;
      swap(u, v);
    }
    val = val * u % MOD;
    if (val < 0)
      val += MOD;
    return *this;
  }
  constexpr bool operator==(const Fp &r) const noexcept
  {
    return this->val == r.val;
  }
  constexpr bool operator!=(const Fp &r) const noexcept
  {
    return this->val != r.val;
  }
  friend constexpr ostream &operator<<(ostream &os, const Fp<MOD> &x) noexcept
  {
    return os << x.val;
  }
  friend constexpr Fp<MOD> modpow(const Fp<MOD> &a, long long n) noexcept
  {
    if (n == 0)
      return 1;
    auto t = modpow(a, n / 2);
    t = t * t;
    if (n & 1)
      t = t * a;
    return t;
  }
};

using mint = Fp<MOD>;

struct UnionFind
{
  vector<int> par, siz;

  UnionFind(int n) : par(n, -1), siz(n, 1) {}

  // search root
  int root(int x)
  {
    if (par[x] == -1)
      return x;
    else
      return par[x] = root(par[x]);
  }
  // same group?
  bool issame(int x, int y)
  {
    return root(x) == root(y);
  }

  //  unite
  bool unite(int x, int y)
  {
    x = root(x);
    y = root(y);

    if (x == y)
      return false;
    if (siz[x] < siz[y])
      swap(x, y);
    par[y] = x;
    siz[x] += siz[y];
    return true;
  }
  int size(int x)
  {
    return siz[root(x)];
  }
};

void dfs(const Graph &G, int v, vector<bool> &seen)
{
  seen[v] = true;

  for (auto next_v : G[v])
  {
    if (seen[next_v])
      continue;
    dfs(G, next_v, seen);
  }

  return;
}

int main()
{
  string s;
  cin >> s;

  cout << "Hello World!" << endl;

  return 0;
}