Problem: In 2020, AtCoder Inc. with an annual sales of more than one billion yen (the currency of Japan) has started a business in programming education.
One day, there was an exam where a one-year-old child must write a program that prints `Hello World`, and a two-year-old child must write a program that receives integers A, B and prints A+B.
Takahashi, who is taking this exam, suddenly forgets his age.
He decides to write a program that first receives his age N (1 or 2) as input, then prints `Hello World` if N=1, and additionally receives integers A, B and prints A+B if N=2.
Write this program for him.

Constraints

* N is 1 or 2.
* A is an integer between 1 and 9 (inclusive).
* B is an integer between 1 and 9 (inclusive).

Input

Input is given from Standard Input in one of the following formats:


1



2
A
B


Output

If N=1, print `Hello World`; if N=2, print A+B.

Examples

Input

1


Output

Hello World


Input

2
3
5


Output

8

Solution (in JAVA):

Solution:
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		new Main().execute();
	}
	
	private void execute() {
		Scanner sc = new Scanner(System.in);
		final 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);
		}
		
	}
	
}