Do the curved horns look dark?
Yes, the horns are dark.
    src        edge_attr  dst
0     0   to the left of   14
1     0   to the left of    3
2     0   to the left of    9
3     1       wrapped in    3
4     2  to the right of    7
5     3  to the right of    0
6     4   to the left of   15
7     5               of    6
8     5  to the right of   10
9     6   to the left of   15
10    6  to the right of   17
11    6  to the right of   10
12    7   to the left of   16
13    7   to the left of    2
14    8   to the left of   13
15    9  to the right of   10
16    9   to the left of   11
17    9  to the right of    0
18   10   to the left of    9
19   10   to the left of    5
20   10   to the left of    6
21   10   to the left of   11
22   10   to the left of   14
23   11  to the right of   10
24   11  to the right of    9
25   12               on   18
26   12   to the left of   13
27   13               on   18
28   13  to the right of   12
29   13  to the right of    8
30   14               on   18
31   14  to the right of   10
32   14  to the right of    0
33   15  to the right of    4
34   15  to the right of    6
35   16  to the right of    7
36   17   to the left of    6