import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
public class Main {

	public static void main(String[] args){
		//		Scanner sc = new Scanner(System.in);
		BufferedReader input
		= new BufferedReader(new InputStreamReader(System.in));
		try{
			String tmp0[] = input.readLine().trim().split(" ");
			int n = Integer.parseInt(tmp0[0]);

			System.out.println("Hello World!");
		}catch(IOException e){
			e.printStackTrace();
		}
	}

}