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

#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define repab(i, a, b) for (int i = (int)(a); i <= (int)(b); i++)
#define repabc(i, a, b, c) for (int i = (int)(a); i <= (int)(b); i += c)
#define rrep(i, n) for (int i = (int)(n)-1; i >= 0; i--)
#define rrepab(i, a, b) for (int i = (int)(b); i >= (int)(a); i--)
#define rrepabc(i, a, b, c) for (int i = (int)(b); i >= (int)(a); i-=c)
#define printl(...) cerr << "LINE=" << __LINE__ << " "; print(__VA_ARGS__)

void in_print() {}
template <class Head, class... Tail>
void in_print(Head&& head, Tail&&... tail)
{
  cerr << "," << head;
  in_print(forward<Tail>(tail)...);
}
void print() {}
template <class Head, class... Tail>
void print(Head&& head, Tail&&... tail)
{
  cerr << head;
  in_print(forward<Tail>(tail)...);
  cerr << endl;
}
/*
unsigned int randxor()
{
    static unsigned int x=123456789,y=362436069,z=521288629,w=88675123;
    unsigned int t;
    t=(x^(x<<11));x=y;y=z;z=w; return( w=(w^(w>>19))^(t^(t>>8)) );
}
*/


//char grid[8][8];
//static const int dx[] = {0,-1,0,1,1,-1,-1,1};
//static const int dy[] = {-1,0,1,0,1,1,-1,-1};
//static const char dir[] = {'L','U','R','D'};
//auto start_time = chrono::system_clock::now();
//auto end_time = chrono::system_clock::now();
//if (chrono::duration_cast<chrono::milliseconds>(end_time - start_time).count() > 500)


int main()
{
    string ad;
    cin >> ad;
    cout << "Hello World!" << endl;
}