Which color is the hair?
The hair is dark.
    src        edge_attr  dst
0     0   to the left of   10
1     0  to the right of    2
2     0  to the right of    7
3     0   to the left of    6
4     1   to the left of    4
5     2   to the left of    0
6     2   to the left of    6
7     4  to the right of    1
8     5  to the right of    8
9     5   to the left of   11
10    6  to the right of    7
11    6  to the right of    2
12    6  to the right of    0
13    6   to the left of   10
14    7   to the left of    0
15    7   to the left of    6
16    8   to the left of    5
17   10  to the right of    6
18   10  to the right of    0
19   10  to the right of   11
20   11   to the left of   10
21   11  to the right of    5