using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Input an EVEN number to process up to 50");

        Console.Write("Input number");

        int num = Convert.ToInt32(Console.ReadLine());

        while (num <= 50)

        {

            Console.WriteLine(num);

            num += 2;

        }

        Console.WriteLine("END");

    }

}