using System;

public class Program

{

    public static void Main()

    {

        do{

            Console.Write("x = ");

            string str = Console.ReadLine();

            int D = Convert.ToInt32(str);

            Console.Write("y = ");

            string xtr = Console.ReadLine();

            int C = Convert.ToInt32(xtr);

            int DC = D + C;

            Console.WriteLine("Output: " + DC);

        }

        while (true);

    }

}