| +--------------17.9----------------+ | 
				| :                                  : | 
				| :                                  : | 
				| :                                  : | 
				| +-------------16.4-------------10                                 10 | 
				| :                               :                                  : | 
				| :                               4                                  : | 
				| 6                               :C                                 : | 
				| 2.8+--4.9---+2.B:                               +--------------17.9.4--------------+--+ | 
				| -+-----10-9-------+                                                                     : | 
				| : | 
				| : | 
				| : | 
				| : | 
				| : | 
				| 19.9 | 
				| : | 
				| : | 
				| : | 
				| : | 
				| : | 
				| 30                                                                                      : | 
				| : | 
				| +----------------19.9------------------+ | 
				| :                                     D: | 
				| :                                      : | 
				| :                                      : | 
				| :                                      : | 
				| 12                                      : | 
				| :                                      : | 
				| :                                      : | 
				| A                                              19.9                                  19.9 | 
				| -----------------------26------------------------:                                      : | 
				| :                                      : | 
				| :                                      : | 
				| :                                      : | 
				| :                                      : | 
				| :                                      : | 
				| +----------------19.9------------------+ |