using System;

class Program
{
    static void Main()
    {
        int n = int.Parse(Console.ReadLine());

        Console.Write("x");
        Console.Write(new string(' ', n - 2));
        Console.WriteLine("x");
        int counter = 4;
        int middleCounter = 1;
        int downCounter = 1;

        for (int i = 1; i <= n - 4; i++)
        {

            Console.Write(new string(' ', i));
            Console.Write("x");
            Console.Write(new string(' ', n - counter));
            Console.WriteLine("x");

            counter+=2;
            middleCounter++;
            if ((n - counter) < 1)
            {
                break;
            }
        }

        Console.Write(new string(' ', middleCounter));
        Console.WriteLine("x");
        for (int j = 1; j <= n - 4; j++)
        {
            middleCounter--;
            if (middleCounter == 0)
            {
                break;
            }
            Console.Write(new string(' ', middleCounter));
            Console.Write("x");
            Console.Write(new string(' ', downCounter));
            downCounter += 2;
            Console.WriteLine("x");
        }


        Console.Write("x");
        Console.Write(new string(' ', n - 2));
        Console.WriteLine("x");
    }
}