using System;

public class Program

{

    public static void Main()

    {

          string data = Console.ReadLine();

            var intData = Convert.ToInt32(data);

            for (int i = 0; i < intData; i++)

            {

                for (int j = 0; j <= i; j++)

                {

                    Console.Write("");

                }

                Console.Write("\n");

            }

            for (int i = 0; i < intData; intData--)

            {

                for (int j = 1; j < intData; j++)

                {

                    Console.Write("");

                }

                Console.Write("\n");

            }

​

    }

}