id: 235 yr ( 10, (9, 1, 0, 0)) (( 4.2, 4.4 ), ( 5.0, 10.1 ))
 +12 |                             +18 
  |                              
  +    +    +    +    +    +  2020 +
  |                              
  |                              
  |                              
  |                              
  +    +    +    +    +  2018 +    +
  |                              
  |                     2016        
  |                   2011          
  |                              
  +    +    +    +    +    +    +
  |                              
  |              2014 2019            
  |            2013   2017             
  |                              
  +    +    +    +    +    +    +
  |                              
  |           2012                  
  |                              
  |                              
--+----+----+----+----+----+----+
  |                              
  |                              
  |                              
  |                              
  +    +    +    +    +    +    +
  |                              
  |                              
  2015                              
  |                              
 -5 +    +    +    +    +    +