(5,2)        -> (14,17)     
(6,2)        -> (15,18)     
(7,2)        -> (15,19)     
(8,2)        -> (15,20)     
(4,3)        -> (13,17)     
(5,3)        -> (14,18)     
(6,3)        -> (14,19)     
(7,3)        -> (14,20)     
(8,3)        -> (14,21)     
(4,4)        -> (13,18)     
(5,4)        -> (13,19)     
(6,4)        -> (13,20)     
(7,4)        -> (13,21)     
(4,5)        -> (12,19)     
(5,5)        -> (12,20)     
(6,5)        -> (12,21)     
(4,6)        -> (11,19)     
(5,6)        -> (11,20)