#include <bits/stdc++.h>
using namespace std;

int main() {
  int N, A, B;
  cin >> N;
  
  if(N == 1) cout << "Hello World" << endl;
  else {
    cin >> A >> B;
    cout << A+B << endl;
  }
  
}
#define _GLIBCXX_DEBUG
#include<bits/stdc++.h>
#define rep(i,n) for (int i = 0;i < (n);i++)
#define all(v) v.begin(),v.end()
using namespace std;
using ll = long long;
using P = pair<ll,ll>;
using vl = vector<ll>;
using vvl = vector<vl>;

ll gcd(ll a,ll b){
  if(b == 0) return a;
  return gcd(b , a % b);
}

ll mod(ll a){
  return (a % 1000000007);
}

ll lcm(ll a,ll b){
  return (a*b)/gcd(a,b);
}


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