#include <bits/stdc++.h>
#define booga cout << "booga" << endl
#define ll long long int
/* run this program using the console pauser or add your own getch, system("pause") or input loop */
using namespace std;

int main(){
	ios::sync_with_stdio(false);
	cin.tie(0);
	int n,a,b;
	cin >> n >> a >> b;
	if(n == 1){
		cout << "Hello World ";
	}
	else{
		cout << a+b;
	}
	return 0;
}




#include <bits/stdc++.h>
using namespace std;
#define _GLIBCXX_DEBUG
#define rep(i, from, to) for (int i = from; i < (to); ++i)
#define mp(x,y) make_pair(x,y)
#define all(x) (x).begin(),(x).end()
#define sz(x) (int)(x).size()
using ll = long long;
using vin=vector<int>;
using vll=vector<ll>;
using P = pair<int, int>;
const int inf=1e9+7;
const ll INF=1e18;
template <typename T> void chmin(T &a, T b) { a = min(a, b); }
template <typename T> void chmax(T &a, T b) { a = max(a, b); }

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;
}







