the hole way from /d/xingxiu/shanjiao to shamo 7
is:
 w n  n w e s  n
from 7 --->1
is e s
1 w 2       w
1 s 11
1 n 10
2 n 3        n
2 s 10
2 w 12
2 e 11
3  w 4         w
3 e 10
3 s 11
3 n 12
4 e 5        e
4 w 11
4 n 13                 n-------------->13
4 s 10
5 s 6        n
5 e 10
5 w 11
5 n 12
6 n 7
n
6 e 11
6 s 1
6 w 10
7 n 8         n
7 e 11
7 s 12
7 w 10
8 w out
8 e 6
10 w 3
10 s 1
10 e 3
10 n 3
11 n 1
11 s 5
11 e 5
11 w 5
12 n 5
12 s 3
12 e 3
12 w 5
13 w w --------------->a new place
13 s 6
