Is the fence snowy or is it rocky?
The fence is rocky.
    src        edge_attr  dst
0     1   to the left of    4
1     1  to the right of    2
2     1  to the right of   17
3     2  to the right of   17
4     2   to the left of   14
5     2   to the left of    4
6     2   to the left of    1
7     3   to the left of   12
8     3   to the left of   13
9     3  to the right of   17
10    4  to the right of   11
11    4  to the right of   14
12    4  to the right of    5
13    4  to the right of   12
14    4  to the right of    2
15    4  to the right of    1
16    5   to the left of    4
17    5   to the left of   13
18    5  to the right of    7
19    6   to the left of   16
20    7   to the left of    5
21    7   to the left of    8
22    7   to the left of   17
23    7   to the left of   11
24    8  to the right of    7
25    9           behind   11
26   11   to the left of   13
27   11   to the left of    4
28   11   to the left of   16
29   11  to the right of    7
30   11      in front of    9
31   12  to the right of   17
32   12   to the left of   13
33   12   to the left of    4
34   12  to the right of    3
35   13  to the right of   11
36   13  to the right of   12
37   13  to the right of   17
38   13  to the right of    3
39   13  to the right of    5
40   14   to the left of    4
41   14  to the right of    2
42   14  to the right of   17
43   16  to the right of   11
44   16  to the right of    6
45   17   to the left of   13
46   17   to the left of   12
47   17   to the left of    1
48   17   to the left of    2
49   17   to the left of   14
50   17  to the right of    7
51   17   to the left of    3