Counter

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

class ShmoogleCounter
{
    static void Main()
    {
        List<string> ints = new List<string>();
        List<string> doubles = new List<string>();

        while (true)
        {
            string line = Console.ReadLine();

            if (line == @"//END_OF_CODE")
            {
                break;
            }

            if (string.IsNullOrEmpty(line))
            {
                continue;
            }

            const string Pattern = @"(\b(int|double)\b \b([a-z][a-zA-Z]{0,24})\b)";
            MatchCollection matches = Regex.Matches(line, Pattern);

            foreach (Match match in matches)
            {
                if (match.Groups[1].Success)
                {
                    if (match.Groups[2].Value == "int")
                    {
                        ints.Add(match.Groups[3].Value);
                    }
                    else
                    {
                        doubles.Add(match.Groups[3].Value);
                    }
                }
            }
        }

        doubles.Sort();
        ints.Sort();
        Console.WriteLine(
            "Doubles: {0}{1}Ints: {2}",
            doubles.Count > 0 ? string.Join(", ", doubles) : "None",
            Environment.NewLine,
            ints.Count > 0 ? string.Join(", ", ints) : "None");
    }
}