0.0  4.0 
    1.0  5.0 
    2.0  6.0 
    4.0  6.0 
    5.0  5.0 
    6.0  3.0 
    7.0  1.0 
    8.0  1.0 
    9.0  1.0 
   10.0  3.0 
   11.0  4.0 
   12.0  4.0 
   13.0  3.0 
   14.0  3.0 
   15.0  4.0 
   16.0  4.0 
   17.0  3.0 
   18.0  0.0