using System;

public class Program

{

    public static void Main()

    {

        do {

        Console.Write("x = ");

            String str = Console.ReadLine();

            if ( str == "exit")

            {

            Console.WriteLine("Program has been stopped!");

                break;

            }

            else 

            {

            int x = Convert.ToInt32(Console.ReadLine(

            ));

                Console.Write("y = ");

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

                int sum = x + y;

                Console.WriteLine("Result: {0}", sum);

            }

        }

            while (true); 

    }

}