#include <bits/stdc++.h>
#define rep(i,n) for (int (i) = 0; (i) < (n); i++)
#define ll long long
using namespace std;
int main() {
  ll N = 0, A,B;;
  cin >> N >> A >> B;
  if(N == 1){
    cout << "Hello World";
  }
  else{
    cout << A + B;
  }
}
  
#include <iostream>
using namespace std;
int main(){
  int n;
  cin >> n;
  if(n==1){
    cout << "Hello World" << "\n";
    return 0;
  }
  else{
    int a,b;
    cin >> a >> b;
    cout << a+b << "\n";
    return 0;
  }
}