What is the color of the leaves?
The leaves are green.
    src        edge_attr  dst
0     0  to the right of    8
1     0   to the left of    4
2     0   to the left of    3
3     3  to the right of    0
4     3   to the left of    5
5     3   to the left of    4
6     3  to the right of    9
7     4   to the left of    5
8     4  to the right of    3
9     4  to the right of    0
10    5  to the right of    4
11    5  to the right of    3
12    6               on    7
13    6  to the right of    8
14    6   to the left of    7
15    7  to the right of    6
16    8   to the left of    6
17    8   to the left of    0
18    9   to the left of    3