/* Copyright (c) 2008 Anonymous
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that you grant this
 * same permission to anyone you distribute it to without any additional
 * restrictions.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

using System;
using System.Collections.Generic;

class BBCoder
{ public static void Main(string[] args)
  { string[] bbcode = new string[] {"aa", "b", "i", "m", "o", "s", "spoiler", "sub", "sup", "u"};
    Stack<string> tag_stack = new Stack<string>();
    Random rand = new Random();
    foreach(string arg in args)
    { if(rand.Next(2) != 0 && tag_stack.Count != 0) Console.Write("[/" + tag_stack.Pop() + "] " + arg);
      else
      { tag_stack.Push(bbcode[rand.Next(bbcode.Length)]);
        Console.Write(" [" + tag_stack.Peek() + "]" + arg); }}
    while(tag_stack.Count != 0) Console.Write("[/" + tag_stack.Pop() + "]");
    Console.WriteLine(); }}