RegexMon

using System;
using System.Text.RegularExpressions;

namespace _03.RegexMon
{
    class RegexMon
    {
        static void Main()
        {
            string text = Console.ReadLine();
            Regex pattern = new Regex(@"(?<Didi>[^A-Za-z\-]+)|(?<Bojo>[A-Za-z]+[\-]{1}[A-Za-z]+)");

            MatchCollection matchesCollection = pattern.Matches(text);
            int turn = 1;
            foreach (Match match in matchesCollection)
            {
                var didi = match.Groups["Didi"];
                var bojo = match.Groups["Bojo"];

                if (turn % 2 == 1)
                {
                    if (didi.Length == 0)
                    {
                        continue;
                    }
                    else
                    {
                        Console.WriteLine(didi);
                        turn++;
                    }
                }
                else
                {
                    if (bojo.Length == 0)
                    {
                        continue;
                    }
                    else
                    {
                        Console.WriteLine(bojo);
                        turn++;
                    }
                }
            }
        }
    }
}