using System;

public class Program

{

    public static void Main()

    {

        int[]a=new int[4]{3,4,6,7};

        int[]b=new int[a.Length];

        Reverse (a,b);

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

        {

        Console.Write(b[i] + ",");

        }

    }

    public static int[] Reverse (int[]a,int[]b)

    {

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

     {

       b[a.Length-1-i] = a[i];

     }

       return b;

    }

}