(0, 0)
(9, -2)
(5, 0)
(5, -2)
(2, 3)
(4, 0)
(3, -1)
(-9, -1)
(3, 0)
(7, 0)
(7, -4)
(7, -1)
(-4, 1)
(-11, 0)
(9, 0)