North
West East
South

-30
-29
-28
-27
-26
-25
-24
-23
-22
-21
-20
-19
-18
-17
-16
-15
-14
-13
-12
-11
-10
-9
-8
-7
-6
-5
-4
-3
-2
-1
0
15
14
13
12
11
10
9
8
7
6
5
4

3
2
1
0

-1

-2
-3
-4
-5

-6
-7
-8
-9

-10
-11
-12

-13
-14
-15