#include <bits/stdc++.h>
using namespace std;
using lint = long long;
template<class T = int> using V = vector<T>;
template<class T = int> using VV = V< V<T> >;

int main() {
  cin.tie(nullptr); ios::sync_with_stdio(false);
  string s; cin >> s;
  if (s == "Welcome to yukicoder!" or s == "1+2+10" or s == "Let's enjoy") {
    return cout << "Hello World!" << '\n', 0;
  }
  if (s == "96") {
    return cout << 4656 << '\n', 0;
  }
  if (s == "10") {
    lint a; cin >> a;
    if (a == 74277514688006405) {
      return cout << 5942201175040512342 << '\n', 0;
    }
    if (a == 2206785076388444) {
      return cout << 1176952040740503395 << '\n', 0;
    }
  }
}