(1, 1)
(1, 2)
(1, 3)
(1, 4)
(1, 5)
(2, 3)
(2, 3)
(4, 1)
(5, 1)

##</code><code>##

(1, 1)
(1, 2)
(1, 3)
(1, 4) or (4, 1)
(1, 5) or (5, 1)
(2, 3)