Is the flag on the left or on the right side?
The flag is on the left of the image.
    src        edge_attr  dst
0     0  to the right of   12
1     0   to the left of   13
2     0   to the left of   11
3     0   to the left of    1
4     1  to the right of   11
5     1  to the right of    0
6     1  to the right of    4
7     4   to the left of    1
8     4  to the right of   11
9     4  to the right of   12
10    4   to the left of   13
11    5  to the right of    9
12    5   to the left of    7
13    5  to the right of   10
14    6  to the right of   12
15    6   to the left of   13
16    7  to the right of    9
17    7  to the right of    5
18    7  to the right of   10
19    7  to the right of    8
20    8   to the left of    7
21    9   to the left of    5
22    9   to the left of    7
23   10   to the left of    5
24   10   to the left of    7
25   11   to the left of   13
26   11  to the right of   12
27   11  to the right of    0
28   11   to the left of    1
29   11   to the left of    4
30   12   to the left of    0
31   12   to the left of    4
32   12   to the left of   11
33   12   to the left of    6
34   13  to the right of    0
35   13  to the right of    4
36   13  to the right of   11
37   13  to the right of    6