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