#include <cstdio>
#include <cmath>

#include <iostream>
#include <vector>
#include <list>
#include <algorithm>

int main() {

  /* default begin */
  long i, j, k;
  long n, m;
  long temp;
  long t;
  std::vector<long> v;
  bool b;
  /* default end */

  std::string str;

  std::cin >> str;
  std::cout << "Hello World!" << std::endl;

  return 0;
}