#include <iostream>

using namespace std;

int main() {
  int N;
  cin >> N;
  if (N == 1) {
    cout << "Hello World" << endl;
    return 0;
  }
  int A, B;
  cin >> A >> B;
  cout << A + B << endl;
  
  return 0;
}

#include <bits/stdc++.h>
#define rep(i, n) for(int i= 0; i < (n); i++)
using ll= long long int;
using namespace std;
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }
ll mod= 1e9 + 7;



int main(){
  int g;
  cin >>g;
  int a,b;
  cin >>a >>b;
  if(g==1){cout << "Hello World" << endl;}else{cout << a+b << endl;}
}