Is this a bus or a truck?
This is a truck.
    src        edge_attr  dst
0     0   to the left of   11
1     0   to the left of   12
2     0   to the left of   16
3     0   to the left of    4
4     0  to the right of    1
5     0   to the left of    9
6     0   to the left of    5
7     1   to the left of   12
8     1   to the left of   14
9     1   to the left of    0
10    1   to the left of   11
11    1   to the left of    5
12    3  to the right of    5
13    3  to the right of    4
14    3   to the left of    7
15    3   to the left of   10
16    4   to the left of    3
17    4  to the right of    0
18    4  to the right of   12
19    4  to the right of    5
20    4   to the left of   10
21    5  to the right of    0
22    5  to the right of    1
23    5   to the left of    3
24    5   to the left of    4
25    5  to the right of   12
26    6               of   14
27    7  to the right of   10
28    7   to the left of   13
29    7  to the right of    3
30    7   to the left of   15
31    9  to the right of    0
32   10  to the right of    4
33   10  to the right of    3
34   10   to the left of   15
35   10   to the left of    7
36   10   to the left of   13
37   11               of   14
38   11  to the right of    0
39   11  to the right of    1
40   12  to the right of    0
41   12  to the right of    1
42   12   to the left of    4
43   12   to the left of    5
44   13  to the right of   10
45   13  to the right of    7
46   13   to the left of   15
47   14  to the right of    1
48   15  to the right of   13
49   15  to the right of   10
50   15  to the right of    7
51   16  to the right of    0