using System;
using System.Text.RegularExpressions;

public class Test
{
	public static void Main()
	{
		var myString = "af8a4gAJJVA*j AVJ SAJ faf";
        myString = Regex.Replace(myString, @"[a-zA-Z\s]", string.Empty);
        Console.WriteLine(myString);
	}
}