using System;
using System.Text.RegularExpressions;

{
	var pattern = @"(?((?'-1'))|(?'outer'(?'1'\S)+|(?'1'\s)))+(?!(?'-1'))";
	pattern = @"(?((?'-1'))|(?:(?'1'\S)+|(?'1'\s)))+(?!(?'-1'))";
	pattern = @"(?((?'-1'))|((?'1'\S)+|(?'1'\s)))+(?!(?'-1'))";
	
	var input = "abc";
	var regexCompiled = new Regex(pattern, RegexOptions.Compiled);
	var regexInterpreted = new Regex(pattern, RegexOptions.None);
	
	Console.WriteLine($"----------Compiled results count:{regexCompiled.Matches(input).Count}------------");
	foreach(Match mh in regexCompiled.Matches(input))
	{
		Console.WriteLine($"Compiled: [{mh.Value}]");
	}
	Console.WriteLine($"----------Interpreted results count:{regexInterpreted.Matches(input).Count}------------");
	foreach(Match mh in regexInterpreted.Matches(input))
	{
		Console.WriteLine($"Interpreted: [{mh.Value}]");
	}
}
Console.WriteLine("#################################################################");
{
	var pattern = @"(?((?'-1'){6})|((?'1'(?'2'\S))+|(?'1'(?'2'\s))))+(?!(?'-1'))";
	var input = "it not";
	var regexCompiled = new Regex(pattern, RegexOptions.Compiled);
	var len = regexCompiled.Matches(input).Count;
}