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