Are the boxes on the right side or on the left?
The boxes are on the right of the image.
    src        edge_attr  dst
0     0  to the right of    6
1     1  to the right of    6
2     3  to the right of    6
3     4  to the right of    6
4     4  to the right of    7
5     6   to the left of   15
6     6   to the left of    3
7     6   to the left of    4
8     6   to the left of    7
9     6  to the right of   10
10    6  to the right of   14
11    6   to the left of    1
12    6   to the left of    0
13    7   to the left of    4
14    7  to the right of   14
15    7  to the right of    6
16    8   to the left of   15
17    8  to the right of   14
18    9            under   11
19    9            below   11
20   10               on    6
21   10   to the left of    6
22   11           beside   15
23   14   to the left of    8
24   14   to the left of    7
25   14   to the left of    6
26   14   to the left of   15
27   15  to the right of    6
28   15  to the right of   14
29   15  to the right of    8