RegEx

using System;
using System.Text.RegularExpressions;

public class Program
{
    public static void Main()
    {
         string txt="/*bilostaaa*/+++ ";

      string re1="((?:[a-z][a-z]+))";   // Word 1

      Regex r = new Regex(re1,RegexOptions.IgnoreCase|RegexOptions.Singleline);
      Match m = r.Match(txt);
      if (m.Success)
      {
            String word1=m.Groups[1].ToString();
            Console.Write("["+word1.ToString()+"]"+"\n");
      }
      Console.ReadLine();
    }
}