Is there brown grass?
Yes, there is brown grass.
    src        edge_attr  dst
0     0   to the left of    6
1     1   to the left of   15
2     3   to the left of   15
3     6  to the right of    7
4     6               on    5
5     6  to the right of    0
6     6  to the right of    8
7     6  to the right of   18
8     7               on    5
9     7   to the left of   12
10    7   to the left of    9
11    7   to the left of    6
12    8   to the left of    6
13    8  to the right of   18
14    9   to the left of   12
15    9  to the right of    7
16    9  to the right of   14
17   11  to the right of   13
18   12  to the right of    7
19   12  to the right of    9
20   13   to the left of   11
21   14   to the left of    9
22   15  to the right of    1
23   15  to the right of    3
24   15  to the right of   17
25   16  to the right of   17
26   17   to the left of   15
27   17   to the left of   16
28   18   to the left of    8
29   18   to the left of    6