How big is this plane?
The plane is small.
    src        edge_attr  dst
0     0   to the left of   15
1     2   to the left of    6
2     5   to the left of    7
3     5  to the right of   12
4     6   to the left of   14
5     6  to the right of   16
6     6  to the right of    2
7     7  to the right of    5
8     7  to the right of   11
9     7  to the right of    8
10    7  to the right of   12
11    8   to the left of   14
12    8               on    1
13    8   to the left of    7
14   11   to the left of    7
15   11   to the left of   14
16   12   to the left of    7
17   12   to the left of    5
18   13               of    8
19   13   to the left of   15
20   14  to the right of   11
21   14  to the right of    8
22   14  to the right of    6
23   15  to the right of    0
24   15  to the right of   13
25   16   to the left of    6