1
horizontal
bottom-right-to-top-left
2
corner
bottom-right-to-top-left
3
horizontal
bottom-to-top
4
diagonal
top-to-bottom
5
diagonal
bottom-right-to-top-left
6
vertical
bottom-right-to-top-left
7
diagonal
bottom-right-to-top-left
8
horizontal
bottom-to-top
9
vertical
bottom-right-to-top-left
10
horizontal
bottom-to-top
11
horizontal
bottom-to-top
12
horizontal
bottom-to-top
13
horizontal
right-to-left
14
diagonal
right-to-left
15
vertical
right-to-left
16
corner
right-to-left
17
horizontal
bottom-right-to-top-left
18
horizontal
bottom-right-to-top-left
19
horizontal
left-to-right
20
diagonal
bottom-right-to-top-left
21
dot
bottom-right-to-top-left