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