import java.util.*;
public class Main{
	
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner sc=new Scanner(System.in);
		
		int n=sc.nextInt();
		
		if(n==1) {
			System.out.println("Hello World");
			
			
		}else if(n==2) {
			int A=sc.nextInt();
			int B=sc.nextInt();
			System.out.println(A+B);
			
		}
	}

}