id: 108 yr ( 8, (7, 0, 0, 1)) (( 1.3, 1.4 ), ( 8.7, 1.9 ))
 +11    |            +5 
     |             
     |       2015 13  2018  
     |             
+    +    +    +   
     |  2014    2017     
     |            
     |             
     |  2012          
+    +    +    +   
     |    2019        
     |             
     |             
  2016  |             
+    +    +    +   
     |             
     |             
     |             
     |             
+    +    +    +   
     |             
     |             
     |             
     |             
+    +    +    +   
     |             
     |             
     |             
     |             
 0----+----+----+---1