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

public class Test
{
	public static void Main()
	{
		var m = Regex.Match("apple", "(?<C>a(?=pple)|b(?=anana)|c(?=herry))");
		if (m.Success)
		{
		    Console.WriteLine("fruit\'s initial: {0}", m.Groups["C"].Value);
		}
	}
}