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

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