using System;
using System.Text.RegularExpressions;
 
public class Test
{
public static void Main()
{
String input = @"department_name:womens AND item_type_keyword:base-layer-underwear";
Regex rgx = new Regex(@"(?:(department_name:([\w-]+))|(item_type_keyword:([\w-]+)))");
foreach (Match m in rgx.Matches(input))
{
Console.WriteLine(m.Groups[1].Value);
Console.WriteLine(m.Groups[2].Value);
Console.WriteLine(m.Groups[3].Value);
Console.WriteLine(m.Groups[4].Value);
}
}
}

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