Does this train look bright and short?
No, the train is bright but long.
    src        edge_attr  dst
0     0   to the left of   10
1     1   to the left of   10
2     1   to the left of   11
3     1   to the left of   12
4     1   to the left of    4
5     1   to the left of    9
6     1   to the left of    3
7     1   to the left of    8
8     2  to the right of    6
9     3  to the right of    8
10    3  to the right of   12
11    3  to the right of   11
12    3  to the right of    1
13    4  to the right of    1
14    4   to the left of   10
15    6   to the left of    2
16    7  to the right of   12
17    8  to the right of    1
18    8   to the left of    3
19    8  to the right of   12
20    9  to the right of    1
21   10  to the right of    1
22   10  to the right of    0
23   10  to the right of    4
24   11   to the left of    3
25   11  to the right of    1
26   12   to the left of    8
27   12   to the left of    7
28   12   to the left of    3
29   12  to the right of    1