03. Trainegram

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;

namespace ExamSecondPreparation
{
    class Program
    {
        static void Main(string[] args)
        {
            List<string> l = new List<string>();
            string pattern = @"(^<\[[^a-zA-Z0-9]*\]\.(\.\[[a-zA-Z0-9]*\]\.)*)$";
            string text = Console.ReadLine();
            while (text != "Traincode!")
            {
                if (Regex.IsMatch(text, pattern))
                {
                    l.Add(text);
                }
                text = Console.ReadLine();
            }
            foreach (var item in l)
            {
                Console.WriteLine(item);
            }
        }
    }
}