using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine(new Program().GetValue(2));

    }

    public string GetValue(int x)

    {

        return 0 switch

        {

            _ when x == 1 => "Hello",

            _ when x == 2 => "World",

            _ => "NaN"

        };

    }

}