using System;
using System.Linq;
using System.Collections.Generic;
using System.Text.RegularExpressions;
 
public class Test
{
	public static void Main()
	{
		var regex = @"[0-9]+|\b(?:\p{Lu}+\b|\w)";
		var list = new List<string> {"Freestyle steel","Freestyle Alloy","Trekking steel uk","Single speed","5 speed","15 speed","3 Speed internal gear with 55 coaster","MTB steel","Junior MTB"};
		foreach(var data in list)
		{
			var matches = Regex.Matches(data, regex).Cast<Match>().Select(m => m.Value.ToUpper());
			Console.WriteLine(string.Join("", matches));
		}
	}
}

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