#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for(int i=0, i##_len=(n); i<i##_len; ++i)
#define pl(s) cout << s << endl;
using ll = long long;
constexpr long long MOD = 1000000007;
int main(void) {
  string s; cin >> s;
  
  cout << "Hello World!" << endl;
  return 0;
}