*-*-*                                                      
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                  *-*-*     *       *-*-*-*                                              
                 /     \   /               \                                             
    *-*-*-*     *       *-*                 *-*-*   *-*                                  
   /       \   /                                 \ /   \                                 
  *         *-*                                   *     *                                
 /                                                       \                               
*                                                         *-*       *   *-*              
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                                                              *-*-*   *     *            
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                                                                              *-*        
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                                                                                  *-*-*  
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                                                                                        *