using System;

using System.Text.RegularExpressions;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("ffF");

        var regex = new Regex(@"^([a-zA-Z0-9_\.\-\+])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,6})+$");

        Console.WriteLine("ffF");

        Match match = regex.Match("levanawalla.co.il");

        Console.WriteLine("ffF");

        if (match.Success)

        {

            Console.WriteLine(1);

        }

        else

        {

            Console.WriteLine(2);

        }

    }

}