***
                 ******
               *        *
              *          *
              *          *        *****
             *           *     *         *
             *          *     *           *      ****
             *          **   *             *   **  * *
            * OO      *  ++          *    **        *
           *         *      ++               *    **    *
          *                 ++                ***  ******
          *                 ++  *********               *
          *                 ++           *              *
            **   ***        ++*******     *******       *
   XXXXXXXXXXX**++++********++XXXXXXX*  **XXXXXXX*******XXXXXXXXXXXXXXXX
   X           ++++++                 **                                X
   X           ++++++                                                   X
   X           ++++++                                                   X
   X           ++++++                                                   X
   X          +++++++                                                   X
  XXXXXXXXXXXX+++++++XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
  X          ++++++++                                                    X
  X          ++++++++                                                    X
  X           +++++++                                                    X
  X            ++++++                                                    X
  X             +++++                                                    X
  X                                                                      X
 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
  X                                                                      X
  XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
           X                                                   X
           X                                                   X
           XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
           X                                                   X
           X                                                   X
           X                                                   X
           X                                                   X
           X                                                   X
           XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
           X                                                   X
           X                                                   X
           X                                                   X
           X                                                   X
           X                                                   X
           XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
           X                                                   X
           XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX