Is the flag on the right?
Yes, the flag is on the right of the image.
    src        edge_attr  dst
0     0   to the left of    1
1     1   to the left of    4
2     1  to the right of    0
3     1   to the left of    6
4     1   to the left of   13
5     2  to the right of    7
6     4   to the left of    6
7     4  to the right of    1
8     4               on    8
9     4  to the right of    7
10    6  to the right of    1
11    6  to the right of    4
12    7   to the left of    4
13    7   to the left of   15
14    7   to the left of    2
15   10   to the left of   13
16   13  to the right of   10
17   13  to the right of    1
18   15  to the right of    7