#ifndef INCLUDED_MAIN
#define INCLUDED_MAIN

#include __FILE__

int main() {
    string S;
    cin >> S;
    cout << "Hello World!" << endl;
}

#else

#include <iostream>
#include <vector>
#include <string>
#include <deque>
#include <list>
#include <map>
#include <set>
#include <unordered_set>
#include <unordered_map>
#include <queue>
#include <stack>
#include <algorithm>
#include <functional>
#include <utility>
#include <tuple>
#include <cmath>
#include <limits>
#include <numeric>
#include <iomanip>
#include <sstream>
#include <fstream>

using namespace std;
using ll = long long;
#define rep(i,n) for(ll i=0; i<(n); i++)
#define reps(i,s,n) for(ll i=(s); i<(n); i++)
#define all(x) (x).begin(),(x).end()
#define lb_ind(a,key) lower_bound(all((a)), (key)) - (a).begin()
#define llvec(a,n) vector<ll> (a)((n))
#define yn(flg) cout<<(flg?"Yes":"No")<<endl;

#endif