1
horizontal
bottom-to-top
2
vertical
right-to-left
3
vertical
right-to-left
4
vertical
right-to-left
5
horizontal
bottom-right-to-top-left
6
vertical
bottom-right-to-top-left
7
corner
bottom-right-to-top-left
8
horizontal
bottom-to-top
9
vertical
bottom-right-to-top-left
10
horizontal
bottom-to-top
11
diagonal
right-to-left
12
horizontal
bottom-right-to-top-left
13
horizontal
bottom-right-to-top-left
14
vertical
bottom-to-top
15
corner
bottom-to-top
16
vertical
bottom-right-to-top-left
17
vertical
bottom-right-to-top-left
18
horizontal
bottom-to-top
