(0, 0)
(3, -1)
(-1, 0)
(-3, -1)
(0, 2)
(5, 2)
(1, 1)
(1, 3)
(0, 2)
(1, -2)
(1, -3)
(1, 2)
(-2, 2)
(0, -2)
(3, 3)
(3, 4)
(2, 2)
(1, 2)