(Row, Col)

(19, 20)
(19, 19)
(19, 18)
(19, 17)
(18, 17)
(17, 17)
(17, 16)
(17, 15)
(17, 14)
(17, 13)
(17, 12)
(17, 11)
(16, 11)
(15, 11)
(14, 11)
(13, 11)
(12, 11)
(11, 11)
(11, 10)
(11, 9)
(10, 9)
(9, 9)
(8, 9)
(7, 9)
(7, 8)
(7, 7)
(7, 6)
(7, 5)
(7, 4)
(7, 3)
(6, 3)
(5, 3)
(4, 3)
(3, 3)
(2, 3)
(1, 3)
(1, 2)
(1, 1)
(1, 0)
