Are the rocks large?
No, the rocks are small.
    src        edge_attr  dst
0     1  to the right of    6
1     1   to the left of   17
2     1  to the right of   21
3     2  to the right of   13
4     3   to the left of    8
5     3   to the left of   20
6     3   to the left of   14
7     5  to the right of   13
8     5  to the right of   16
9     6   to the left of    1
10    6   to the left of   22
11    6   to the left of   11
12    8   to the left of   12
13    8  to the right of   19
14    8  to the right of    3
15    8  to the right of   15
16    8  to the right of   18
17   11  to the right of    6
18   11  to the right of   21
19   11  to the right of   22
20   12  to the right of    8
21   12  to the right of   16
22   13   to the left of   17
23   13   to the left of    2
24   13   to the left of    5
25   14  to the right of    3
26   15   to the left of    8
27   16   to the left of   12
28   16     covered with   15
29   16   to the left of    5
30   17  to the right of   13
31   17  to the right of    1
32   18   to the left of   20
33   18   to the left of    8
34   18  to the right of   19
35   19   to the left of   18
36   19   to the left of    8
37   19   to the left of   20
38   20  to the right of   19
39   20  to the right of   18
40   20  to the right of    3
41   21   to the left of   11
42   21   to the left of   22
43   21   to the left of    1
44   22   to the left of   11
45   22  to the right of   21
46   22  to the right of    6