#include<bits/stdc++.h>

#define rep(i,start,end) for(int i=start;i<(int)(end);i++)
#define rrep(i,start,end) for(int i=start-1;i>=(int)(end);i--)
#define each(it,v) for(auto &it : v)
#define all(v) (v).begin(),(v).end()

using namespace std;
using ll = long long;
using vi = vector<int>;
using vll = vector<ll>;
using Pii = pair<int,int>;
using Pll = pair<ll,ll>;
using vpii = vector<Pii>;
using vpll = vector<Pll>;

const ll mod=1e9+7;
const int intINF=INT_MAX;
const ll  longINF=LONG_LONG_MAX;

main()
{
        int a; cin>>a;
        printf("Hello World!\n");
}