Stop

using System;



class Program
{
    static void Main()
    {

        int n = int.Parse(Console.ReadLine());
        int width = 4*n+3;
        //First line
        Console.Write(new string('.', n + 1));
        Console.Write(new string('_', 2 * n + 1));
        Console.WriteLine(new string('.', n + 1));
        //Top Part
        int k = 0;
        for (int i = n; i > 0; i--)
        {
            Console.Write(new string('.', n - k));
            Console.Write(new string('/', 2));
            Console.Write(new string('_', (2 * n - 1) + 2 * k));
            Console.Write(new string('\\', 2));
            Console.WriteLine(new string('.', n - k));
            k++;
        }
        //Middle Part
        Console.Write("//");
        Console.Write(new string('_', (width - 8) / 2));
        Console.Write("STOP!");
        Console.Write(new string('_', (width - 8) / 2));
        Console.WriteLine("\\\\");
        //Lower Part
        int m = 0;
        for (int i = 0; i < n; i++)
        {
            if (m > 0)
            {
                Console.Write(new string('.', m));
            }
            Console.Write(new string('\\', 2));
            Console.Write(new string('_', 4 * n - 1 - 2 * m));
            Console.Write("//");
            if (m > 0)
            {
                Console.Write(new string('.', m));
            }
            Console.WriteLine();
            m++;

        }

    }
}