(2, 3)
(2, 6)
(3, 7)
(5, 6)
(0, 1)
(0, 1)
(6, 7)
(2, 5)
(6, 9)
(4, 8)
(0, 2)
(5, 7)
(4, 8)
(1, 5)
(6, 8)
(6, 9)
(2, 5)
(1, 8)
(5, 7)
(2, 9)