using System;

using System.Linq;

public class Program

{

    public static void Main()

    {

        int[] first = { 1, 2, 3, 4 };

        int[] second = { 0, 2, 3, 5 };

        int[] third = { 1, 1, 1, 2, 3, 4 };

        var inThirdButNotInSecond = third.Except(second);

        // Output the example

        foreach(var number in inThirdButNotInSecond)

        {

            Console.WriteLine(number);

        }

    }

}