using System;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static void Main(string[] args)
    {
        var n = Console.ReadLine();
        if (n == "1") {
            Console.WriteLine("Hello World");
        } else {
            var a = Int16.Parse(Console.ReadLine());
            var b = Int16.Parse(Console.ReadLine());
            Console.WriteLine((a + b).ToString());
        }
    }
}
