#include <algorithm>
#include <bitset>
#include <cassert>
#include <cmath>
#include <cstdio>
#include <cstdlib>
#include <ctime>
#include <deque>
#include <fstream>
#include <functional>
#include <iostream>
#include <map>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <utility>
#include <vector>
using namespace std;

void solve()
{
    string x;
    cin >> x;
    cout << "Hello World!" << endl;
}

// Generated by 2.9.0 https://github.com/kyuridenamida/atcoder-tools  (tips: You use the default template now. You can
// remove this line by using your custom template)
int main()
{
    solve();
    return 0;
}