using System;

public class Program

{

    public static void Main()

    {

        string clave ="eric"; string res ="";

        while (res !=clave)

     {

            Console.Write("Ingrese la clave:");

            res = Console . ReadLine () ;

        }   

        Console.WriteLine( "la clave es correcta" );

        Console.ReadLine ();

        }

}