Is there any brown grass or mud?
No, there is grass but it is green.
    src        edge_attr  dst
0     0   to the left of   14
1     0   to the left of   12
2     1   to the left of   14
3     1   to the left of   12
4     2   to the left of    3
5     3  to the right of    2
6     3  to the right of   13
7     4   to the left of   14
8     4  to the right of    6
9     4  to the right of    9
10    4  to the right of    7
11    5   to the left of    7
12    5               of    6
13    5   to the left of    9
14    6   to the left of   14
15    6   to the left of    4
16    7   to the left of    4
17    7  to the right of    5
18    7   to the left of   14
19    8               of    6
20    9  to the right of    5
21    9   to the left of   14
22    9   to the left of    4
23   12  to the right of    1
24   12  to the right of    0
25   12   to the left of   14
26   13   to the left of    3
27   14  to the right of   15
28   14  to the right of    4
29   14  to the right of    1
30   14  to the right of    7
31   14  to the right of    6
32   14  to the right of    0
33   14  to the right of    9
34   14  to the right of   12
35   15   to the left of   14
36   16               of    6