Are the trees bare or leafy?
The trees are bare.
    src        edge_attr  dst
0     0   to the left of    9
1     0   to the left of    5
2     1   to the left of    5
3     1               on    6
4     1   to the left of    9
5     2   to the left of    6
6     4   to the left of    9
7     4   to the left of    5
8     5  to the right of    0
9     5  to the right of    1
10    5  to the right of    8
11    5  to the right of    4
12    5   to the left of   11
13    6  to the right of    2
14    7               on    6
15    7   to the left of    9
16    8   to the left of    5
17    8   to the left of   10
18    9   to the left of   10
19    9   to the left of   12
20    9  to the right of    0
21    9  to the right of    1
22    9  to the right of    4
23    9  to the right of    7
24   10  to the right of    9
25   10               on   11
26   10  to the right of    8
27   10  to the right of   12
28   11  to the right of    5
29   12   to the left of   10
30   12  to the right of    9
31   12               of    8