id: 294 yr ( 7, (7, 0, 0, 0)) (( 1.6, 1.7 ), ( 12.5, 4.5 ))
 +16    +    +    +8 
|               
|            2012  
|               
|            2017  
+    +    +    +
|        2016      
|              
|      2015 14        
|               
+   2013+ 2018  +    +
|               
|               
|               
|               
+    +    +    +
|               
|               
|               
|               
+    +    +    +
|               
|               
|               
|               
+    +    +    +
|               
|               
|               
|               
 0----+----+----