/------------------------------------------------------------------- 490675/55-92 (1)
      |                                                                               
      |------------------------------------------------------------------- 476701/56-94 (9)
      |                                                                               
      |                                                       /----------- 900546/4-34  (2)
      |                                 /----------93---------+                       
      |                                 |                     \----------- 912349/4-33  (12)
      |                                 |                                             
      |                                 |                     /----------- 476701/3-34  (4)
      |                     /-----93----+          /----100---+                       
      +                     |           |          |          \----------- 490675/5-33  (7)
      |                     |           |          |                                  
      |                     |           |          |---------------------- 477024/4-47  (6)
      |                     |           \----88----+                                  
      |          /----95----+                      |---------------------- 489868/4-45  (8)
      |          |          |                      |                                  
      |          |          |                      \---------------------- 482070/4-43  (10)
      |          |          |                                                         
      |          |          |                                 /----------- 900546/52-92 (3)
      |          |          \---------------100---------------+                       
      \----95----+                                            \----------- 912349/52-91 (13)
                 |                                                                    
                 |                                            /----------- 477024/54-90 (5)
                 |---------------------76---------------------+                       
                 |                                            \----------- 489868/60-97 (14)
                 |                                                                    
                 \-------------------------------------------------------- 482070/55-86 (11)
                                                                                      

      /-------------------------------------------------------------------- 482070 (1)
      |                                                                               
      |-------------------------------------------------------------------- 489868 (5)
      |                                                                               
      |-------------------------------------------------------------------- 477024 (6)
      |                                                                               
      +                                 /---------------------------------- 912349 (2)
      |---------------100---------------+                                             
      |                                 \---------------------------------- 900546 (3)
      |                                                                               
      |                                 /---------------------------------- 490675 (4)
      \---------------100---------------+                                             
                                        \---------------------------------- 476701 (7)