using System;

class ForestRoad
{
    static void Main()
    {
        int n = int.Parse(Console.ReadLine());
        for (int i = 0; i < n; i++)
        {
            Console.Write(new string('.',i));
            Console.Write('*');
            Console.WriteLine(new string('.', (n - i)-1));

        }
        for (int i = 1; i < n; i++)
        {
            Console.Write(new string('.', (n - i) - 1));
            Console.Write('*');
            Console.WriteLine(new string('.', i));

        }
    }
}