#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;}
}
#include <iostream>
#include <vector>
#include <algorithm>
#include <cmath>
#include <map>
#define rep(i,cc,n) for(int i=cc;i<n;++i)
#define drep(i,cc,n) for(int i=cc;i>n;--i)
template<class T>bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }
template<class T>bool chmin(T &a, const T &b) { if (b<a) { a=b; return 1; } return 0; }
const long long INF = 1LL <<60;
typedef long long ll;
using namespace std;

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

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

ll choose2(ll n){
    return n*(n-1)/2;
}

int main(){
    int n;
    cin>>n;
    if(n == 1) cout<<"Hello World"<<endl;
    else{
        int a,b;
        cin>>a>>b;
        cout<<a+b<<endl;
    }
    return 0;
}