using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        var word = "deals-dev-us-ny-01";

        var list = new List<string>();

        var searchStartIndex = 0;

        var foundIndex = 0;

        while((foundIndex = word.IndexOf('-', searchStartIndex)) != -1) {

            list.Add(word.Substring(0, foundIndex));

            searchStartIndex = foundIndex + 1;

        }

        list.Add(word);

        Console.WriteLine(string.Join(",", list));

    }

}