using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace STOP
{
    class Program
    {
        static void Main(string[] args)
        {
            var n = int.Parse(Console.ReadLine());
            int dash = n * 2 - 1;

                Console.Write(new string('.', n+1));
                Console.Write(new string('_', (n * 2) + 1));
                Console.WriteLine(new string('.', n + 1));

            for (int row = 1; row <=n; row++)
            {
                Console.Write(new string('.', n + 1 - row));
                Console.Write(new string('/', 2));
                Console.Write(new string('_',dash));
                Console.Write(@"\\");
                Console.WriteLine(new string('.', n + 1 - row));
                dash += 2;
            }
            Console.Write(new string('/', 2));
            Console.Write(new string('_', (dash-4 )/2));
            Console.Write("STOP!");
            Console.Write(new string('_', (dash - 4)/2));
            Console.WriteLine(@"\\");

            for (int row = 0; row <n ; row++)
            {
                Console.Write(new string('.', row));
                Console.Write(@"\\");
                Console.Write(new string('_', dash));
                dash -= 2;
                Console.Write(new string('/', 2));
                Console.WriteLine(new string('.', row));
            }
        }
    }
}