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

public class Test
{
	public static void Main()
	{
		var input = "one two three #abc four five six #xyz";
    	string[] digits = Regex.Split(input, @"(?<=\B#\w+)\b\s*")
    		.Where(x => !string.IsNullOrEmpty(x)).ToArray();
        foreach (var s in digits)
        	Console.WriteLine(s);
	}
}