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