using System;

public class Program

{

    public static void Main()

    {

        /*      

        A = 1 2 3 1

        B = 2 4 4 4     

        Output = 1 3 4      

        */

        var a = new []{1,2,3,1};

        var b = new []{2,4,4,4};

        Unique(a,b);        

    }

    public static void Unique(int[] a, int[] b){

        var d = Create(a);

        //var d2 = Create(b);

        var d2 = new int[b.Length+1];

        for(var i=0; i<b.Length; i++){

            if (d[i]>0){

                d2[b[i]]++;

            }else{

                d[b[i]]=0;

            }

        }

        Print(d);

        Print(d2);      

    }

    public static void Print(int[] arr){

        for(var i=0; i<arr.Length; i++){

            if (arr[i]>0){

                Console.WriteLine("{0} = {1}", i, arr[i]);

            }

        }

        Console.WriteLine("==============================");        

    }

    public static int[] Create(int[] arr){

        var d = new int[32];

        for(var i=0; i<arr.Length; i++){

            d[arr[i]]++;

        }

        return d;

    }

}