<class id="level-websites">
 (
  (sokobano . "http://sokobano.de/results/display.php?set={set}&lvl={index}")
 )
 </class>
 <class id="level-webpages">
 (
  (1 11 sokobano (set original) (index))
  (12 12 sokobano (set original) (index 50))
  (13 19 sokobano (set original) (index 12))
  (20 20 sokobano (set original) (index 51))
  (21 24 sokobano (set original) (index 20))
  (25 25 sokobano (set original) (index 52))
  (26 36 sokobano (set original) (index 25))
  (37 37 sokobano (set original) (index 53))
  (38 41 sokobano (set original) (index 37))
  (42 42 sokobano (set original) (index 54))
  (43 49 sokobano (set original) (index 42))
  (50 50 sokobano (set original) (index 55))
  (51 90 sokobano (set extra) (index))
 )
 </class>