ForestRoad

using System;

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