/-------------------------------------------------------------------- 30433/239-256 (1)
      |                                                                               
      |-------------------------------------------------------------------- 509/356-375   (3)
      |                                                                               
      +                                            /----------------------- 509/117-135   (2)
      |                      /----------72---------+                                  
      |                      |                     \----------------------- 30433/297-314 (4)
      \----------56----------+                                                        
                             |                     /----------------------- 30433/387-406 (5)
                             \----------75---------+                                  
                                                   \----------------------- 509/169-188   (6)