using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Adel Kassar || FULL STACK DEVELOPER BASED IN BANGSAR, Kuala Lumpur");

        Console.WriteLine();

        for (int i=4 ; i >= 0 ; i--) {

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

                // print the actual number

                Console.Write(j);

            }

            // print line break

            Console.WriteLine();

        }

    }

}