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