using System;
using System.Linq;

public class Test
{
	public static void Main()
	{
		var input = new[] {"quick", "brown", "fox", "jumps"};
        Func<string,bool> filter1 = a => a == "quick";
        Func<string,bool> filter2 = a => filter1(a) || a.Length == 3;
        foreach (var s in input.Where(filter2)) {
            Console.WriteLine(s);
        }
	}
}