On which side is the box?
The box is on the right of the image.
   src        edge_attr  dst
0    0   to the left of    7
1    3  to the right of    4
2    4   to the left of    3
3    4   to the left of    6
4    4  to the right of    8
5    5  to the right of    8
6    6  to the right of    4
7    7  to the right of    0
8    8   to the left of    5
9    8   to the left of    4