using System;

using System.Linq;                  

public class Program

{

    public static void Main()

    {

        object[] input = {"F9", 1, 1, "F9", 3, 3};

            int i = 0;

            var splits = from item in input

                group item by (i++ / 3) % 3

                into part

                select part.ToArray();

            splits.Select(x=>f(x[0],x[1],x[2])).ToList().ForEach(y=>Console.WriteLine(y));

    }

    public static bool f(object s, object x, object y)

    {

        return true;

    }

}