using System;
using System.IO;
using System.Text.RegularExpressions;

public class Test
{
	public static void Main()
	{
		var str = "6 cakes 5 donuts 12 muffins";
		var rx = new Regex(@"\d+\s+\w+");
        var coll = rx.Matches(str);
        foreach (Match m in coll)
            Console.WriteLine(m.Value);
	}
}