using System;
using System.Linq;
using System.Text.RegularExpressions;
public class Test
{
	public static void Main()
	{
		var s = "Please buy 40 kg of apples for 1350$ each, Please call 8 0 0 4 3 2 1 2 4 3 from 17:00 till 22:00, I would like to bid 50 euro on 20 black and pair of spades";
		var res = Regex.Matches(Regex.Replace(s, @"\W+", ""), @"\d+").Cast<Match>().Select(m=>m.Value).ToList();
		Console.Write(string.Join(", ", res));
	}
}