using System;
using System.Text.RegularExpressions;
 
public class Test
{
	public static void Main()
	{
		var pattern = @"(?i)(?<=^\w(?<c>\w)*) (\k<c>(?<-c>)\w+ ?|(?<w>\w+) ?)+$(?(c)(?!))";
        var input = new string[] {
            "RPM Package Manager",
            "Wine is not an emulator",
            "GNU is not Unix",
            "Golf is not an acronym",
            "X is a valid acronym"
        };
 
        var r = new Regex(pattern);
        foreach (var str in input)
        {
            var m = r.Match(str);
            Console.WriteLine(m.Success);
            for (int i = 0; i < m.Groups["w"].Captures.Count; ++i)
                Console.WriteLine(m.Groups["w"].Captures[i].Value);
        }
	}
}

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