| +-------------17--------------+ | 
				| :                             : | 
				| -------------------------31--------------------------+    :                             : | 
				| D                                                    2    :                             : | 
				| -------------------------31--------------------------+   10                            10 | 
				| :    :                             : | 
				| 4.9   :                            F: | 
				| +---------------120917--------------+ | 
				| ::B                                 : | 
				| ::                                  : | 
				| ::                                  : | 
				| ::                                  : | 
				| ::                                  : | 
				| 26                                                  ::                                  : | 
				| ::                                  : | 
				| 23                                 23 | 
				| 24.9                                 : | 
				| ::                                  : | 
				| ::                                  : | 
				| ::                                  : | 
				| ::                                  : | 
				| A                                                   ::                                  : | 
				| --------12----------1-----------+                   ::                                 G: | 
				| :    6.9    :                   +---------------1209----------------+ | 
				| :           3--------------------+ | 
				| 6.9                   12         C: | 
				| :                                4 | 
				| +-------------18.9---------------+ |