North
West East
South

-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
0

-1

-2

-3

-4
-5

-6
-7

-8
-9

-10
-11
-12

-13
-14
-15

-16
-17
-18
-19
-20
-21
-22
-23
-24
-25
-26
-27
-28
-29
-30