^                           t                                                 
  |            t              t                                                 
  |            t           t  t        t     t                                  
  |      t  t  t  t        t  t  t  t  t     t                                  
  |      t  t  t  t  t  t  t  t  t  t  t  t  t                         r        
  |   t  t  t  t  t  t  t  t  t  t  t  t  t  t  t  t                   r        
  |   t  t  t  t  t  t  t  t  t  t  t  t  t  t  t  t                r  r        
  |   t  t  t  t  t  t  t  t  t  t  t  t  t  t  t  t r              r  r        
  |   t  t  t  t  t  t  t  t  t  t  t  t  t  t  t  t rt  t          r  rt       
  |   t  t  t  t rt  t  t  t  t  t rt  t  t  t  t  t rt rt rt  t  t rt rt  t    
 -+---------------------------------------------------------------------------> 
  |  08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 00 01 02 03 04 05 06 07