using System;

​

public class PrePostFix

{

    public static void Main(String[] arg)

    {

        int i = 3, j = 7;

         Console.WriteLine(++i + " " + j--);  

        Console.WriteLine(++i + " " + j--);  

        Console.WriteLine(i + " " + --j);  

        Console.WriteLine(++i + " " + --j);  

    }

}