Is the toilet paper on the right side?
No, the toilet paper is on the left of the image.
   src        edge_attr  dst
0    0  to the right of    1
1    0  to the right of    6
2    1   to the left of    0
3    2  to the right of    3
4    3   to the left of    2
5    3   to the left of    7
6    6   to the left of    0
7    7  to the right of    3