using System;

public class Program

{

    public static void Main()

    {

        var retryAttempt = 0;

        var maxRetryAttempt = 5;

        while(true)

        {

            if (retryAttempt < maxRetryAttempt - 1)

            {

                Console.WriteLine(retryAttempt);

                retryAttempt++;

            }

            else

            {

                break;

            }   

        }   

    }

}