id: 287 yr ( 8, (8, 0, 0, 0)) (( 2.8, 2.9 ), ( 8.4, 7.6 ))
 +16    +    +    +    +    +    +15 
|                              
|                           2011  
|                              
|                              
+    +    +    +    +    +    +
|                              
|                              
|                              
|                              
+    +    +    +    +    +    +
|                              
|                              
|              2016 2017             
|                             
+    +    +  2013 +    +    +    +
|                              
|          2015 2018                 
|                              
|      2014 2012                     
+    +    +    +    +    +    +
|                              
|                              
|                              
|                              
+    +    +    +    +    +    +
|                              
|                              
|                              
|                              
 0----+----+----+----+----+----