How tall is the grass?
The grass is short.
    src        edge_attr  dst
0     0  to the right of    7
1     0  to the right of    5
2     1   to the left of    9
3     3   to the left of   12
4     3   to the left of    7
5     3   to the left of    6
6     5  to the right of   12
7     5   to the left of   17
8     5  to the right of    6
9     5  to the right of    7
10    5   to the left of    0
11    6   to the left of    7
12    6   to the left of   12
13    6   to the left of    5
14    6  to the right of    3
15    7   to the left of   17
16    7  to the right of   12
17    7  to the right of    3
18    7   to the left of    0
19    7  to the right of    6
20    7   to the left of    5
21    8   to the left of    9
22    8   to the left of   10
23    9   to the left of   10
24    9  to the right of    8
25    9  to the right of    1
26   10  to the right of    8
27   10  to the right of    9
28   12  to the right of    3
29   12   to the left of    5
30   12  to the right of    6
31   12   to the left of    7
32   13               on   11
33   13  to the right of   14
34   14   to the left of   13
35   17  to the right of    5
36   17  to the right of    7