Zad 3

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
namespace exam
{
    class exam
    {
        static void Main()
        {
            Regex pattern = new Regex(@"^(<\[[^a-zA-Z0-9]*\]\.){1}(\.\[[a-zA-Z0-9]*\]\.)*$");

            string input = Console.ReadLine();

            while (input != "Traincode!")
            {
                if (pattern.IsMatch(input))
                {
                    Console.WriteLine(input);
                }

                input = Console.ReadLine();
            }

        }
    }
}