                        *    /
|             \                                       /
|              \     *     *                   *     /
|               \                                   /
|                \      *     *             *      /
|                 \                               /
|                  \       B     *      (B)      /
|                   \                           /
|                    \      *       *   *      /
|                     \                       /
|            