language: C# (mono-2.8)
date: 428 days 3 hours ago
link:
visibility: public 
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using System;
using System.Text.RegularExpressions;
 
public class Test
{
        public static void Main()
        {
                String[] tests = new[]{"Q1W2EE3R45T","WWED456J","ABC123"};
 
                foreach (String test in tests)
                {
                        Console.WriteLine("{0,-15} = {1}", test, Regex.Replace(test, @"[^\d]", String.Empty));
                }
        }
}