Is the flag on the right side or on the left of the picture?
The flag is on the left of the image.
    src        edge_attr  dst
0     0  to the right of    1
1     1   to the left of   16
2     1   to the left of    0
3     2  to the right of   12
4     6   to the left of   15
5     6   to the left of   14
6     6   to the left of    8
7     7  to the right of   17
8     8  to the right of    6
9     8   to the left of   14
10   12   to the left of    2
11   14  to the right of    8
12   14  to the right of    6
13   15  to the right of    6
14   15   to the left of   16
15   16  to the right of   15
16   16  to the right of    1
17   17   to the left of    7