2
3
((0,0)  (7,11) (0,0))
((8,4)  (11,7) (0,0))
((12,8)  (15,11) (0,0))
3
((8,4)  (23,15) (0,0))
((8,16)  (23,39) (0,0))
((24,20)  (31,27) (0,0))
