Does the zebra's mane look regular?
No, the mane is irregular.
    src        edge_attr  dst
0     0   to the left of   12
1     0  to the right of   10
2     0  to the right of    9
3     0  to the right of    8
4     0  to the right of    2
5     2  to the right of    5
6     2  to the right of   13
7     2   to the left of    0
8     3  to the right of    9
9     3  to the right of    7
10    5   to the left of    8
11    5   to the left of    2
12    5   to the left of   10
13    6   to the left of   12
14    7   to the left of    3
15    7  to the right of    9
16    8   to the left of    0
17    8  to the right of   13
18    8  to the right of   15
19    8  to the right of    5
20    9   to the left of    3
21    9   to the left of    0
22    9   to the left of    7
23   10  to the right of    5
24   10   to the left of    0
25   10  to the right of   15
26   12  to the right of    6
27   12  to the right of    0
28   13   to the left of    8
29   13   to the left of    2
30   15   to the left of    8
31   15   to the left of   10