5 +-------------------------------------------------------------------------------------------+   
    |                 +                  +             *   *                  +                 |   
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  4 |-+                                                *   ######                             +-|   
    |                                                  *   #    #                               |   
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  3 |-+                             ******             *   #    #                             +-|   
    |                               *    *             *   #    #                               |   
    |                               *    *             *   #    #                               |   
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    |                               *    *             *   #    #                               |   
    |                               *    *             *   #    #                               |   
    |                               *    *             *   #    #                               |   
  2 |-+           *****             *    #####         *   #    #        ******               +-|   
    |             *   *             *    #   #         *   #    #        *    *                 |   
    |             *   *             *    #   #         *   #    #        *    *                 |   
    |             *   *             *    #   #         *   #    #        *    *                 |   
    |             *   *             *    #   #         *   #    #        *    *                 |   
    |             *   *             *    #   #         *   #    #        *    *                 |   
    |             *   *             *    #   #         *   #    #        *    *                 |   
  1 |-+           *   ######        *    #   #         *   #    #        *    #####           +-|   
    |             *   #    #        *    #   #         *   #    #        *    #   #             |   
    |             *   #    #        *    #   #         *   #    #        *    #   #             |   
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  0 +-------------------------------------------------------------------------------------------+   
                     aaa                bbb               ccc                ddd