x       y
 23.5    17.375
 12      20.375
 21      20
 22      20
 19.125  18.375
 21.5    18.675
 22.125  18.675
 20.375  15.25
 18.25   16.5
 21.625  18
 23.25   16.25
 21      18
 22.125  12.75
 23      15.5
 12      18