***
                 ******
               *        *
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              *          *       *****
             *           *    *        *
             *          *    *          *      ****
             *          **  *            *   **  * *
            * OO      *  ++         *   **        *
           *        *     ++              *   **   *
          *               ++               *** *****
          *               ++  *********            *
          *               ++           *           *
            **  ***       ++*******     ******     *
  XXXXXXXXXXXX**+++*******++XXXXXXX*  **XXXXXX*****XXXXXXXXXXXXXXXX
  X            +++++                **                            X
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 X           +++++++                                               X
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 X             ++++                                                X
 X              ++                                                 X
 X                                                                 X
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X                                                                   X
X                                                                   X
X                                                                   X
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 X                                                                 X
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         X                                               X
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         X                                               X
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