using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text.RegularExpressions;

public class Test
{
	public static void Main()
	{
		var strings = new List<string> { "msl_0123456789_otherstuff.csv", "msl_test.xml", "anythingShort.w1" };
    	foreach (var s in strings) 
    	{
        	Console.WriteLine("{0} => {1}", s, new string(Regex.Replace(s, @"^msl_|\.\w{1,3}$","").Take(10).ToArray()));
    	}
	}
}