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