Does the cap have black color?
Yes, the cap is black.
    src        edge_attr  dst
0     0  to the right of    1
1     0               on    8
2     0   to the left of   12
3     0   to the left of   18
4     1   to the left of    2
5     1   to the left of    0
6     1   to the left of   10
7     1   to the left of    8
8     2  to the right of    1
9     3   to the left of    8
10    3  to the right of   15
11    4  to the right of   14
12    4  to the right of    6
13    4  to the right of    5
14    5   to the left of    4
15    6   to the left of    4
16    7   to the left of   14
17    7   to the left of   20
18    8   to the left of   18
19    8  to the right of    3
20    8  to the right of    1
21    9   to the left of   18
22    9   to the left of   13
23   10  to the right of    1
24   12               on   18
25   12  to the right of    0
26   13   to the left of   18
27   13  to the right of    9
28   14   to the left of    4
29   14  to the right of    7
30   15   to the left of    3
31   17   to the left of   18
32   18  to the right of    0
33   18  to the right of   19
34   18  to the right of   17
35   18  to the right of    8
36   18  to the right of    9
37   18  to the right of   13
38   19   to the left of   18
39   20  to the right of    7