Is the tail white or blue?
The tail is blue.
    src        edge_attr  dst
0     0   to the left of    9
1     0   to the left of    7
2     1   to the left of   10
3     1   to the left of    4
4     1  to the right of    5
5     1   to the left of    6
6     3   to the left of   13
7     3  to the right of    5
8     3   to the left of    8
9     4               of    9
10    4  to the right of   10
11    4  to the right of   13
12    4  to the right of    1
13    5   to the left of   14
14    5   to the left of    9
15    5   to the left of    1
16    5   to the left of    3
17    6               of    9
18    6  to the right of    1
19    6  to the right of   10
20    7  to the right of    0
21    7   to the left of   14
22    8  to the right of   14
23    8  to the right of    3
24    9               on    2
25    9  to the right of    0
26    9  to the right of   15
27    9  to the right of    5
28   10   to the left of    4
29   10  to the right of    1
30   10   to the left of    6
31   13   to the left of    4
32   13  to the right of    3
33   14  to the right of    7
34   14  to the right of    5
35   14   to the left of    8
36   15   to the left of    9