(1, 0)
(6, 2)
(1, 2)
(0, 2)
(-4, 3)
(2, 2)
(-6, 3)
(4, -2)
(9, 0)
(-3, 0)
(5, -3)
(7, 1)
(-7, -2)
(-7, 3)
(3, -1)