using System;

public class Program

{

    public static void Main()

    {

        int[] nums = {2, 5, 7, 7, 5, 9, 2, 3};

        //Output = 2,5,7

        //Declare an outer for loop

        for (int i = 0; i < nums.Length; i++) {

            //declare another for loop(inner)

            for (int j = i+1; j < nums.Length; j++) {

                //compare both the arrays using if condition

                if(nums[i]==nums[j]) {

                    Console.WriteLine(nums[i]);

                }

            }

        }

        Console.WriteLine("Hello World");

    }

}