using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void  Main()

    {

        int[] nums1 = {1, 2, 2, 1};

        int[] nums2 = {2, 2};

        var q = nums1.Intersect(nums2);

        //foreach(int v in q){

            Console.WriteLine(q.ToArray());

        //}

        //int[] q = nums1.Distinct().ToArray();

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

        //Console.WriteLine(q[i]);

        //}

    }

}