using System;

public class Program

{

    public static void Main()

    {

        string[] a1 = { "cat", "bird", "dog" };

        string[] a2 = { "cat", "dog", "bird" };

        string[] a3 = { "cat", "fish", "dog" };

​

        Console.WriteLine(a1.GetHashCode());

        Console.WriteLine(a2.GetHashCode());

        Console.WriteLine(a3.GetHashCode());

    }

}