using System;

public class Phongpat

{

    public static void Main()

    {

    string s;

    Console.Write("input string :");

    s=Console.ReadLine();

​

    while(s!="exit")

    {

        Console.WriteLine("{0}",s); 

        Console.Write("input string :");

    s=Console.ReadLine();

    }

        Console.WriteLine("exit")   ;

    }

}