What size is the plane, small or large?
The plane is small.
    src        edge_attr  dst
0     0  to the right of    6
1     0  to the right of   11
2     0  to the right of    8
3     0  to the right of    9
4     0  to the right of    5
5     1               of    6
6     1   to the left of    8
7     2  to the right of    9
8     3   to the left of    5
9     4               of    6
10    5  to the right of    3
11    5   to the left of    0
12    6   to the left of    0
13    7               of    6
14    8  to the right of    1
15    8   to the left of    0
16    9   to the left of    0
17    9   to the left of    2
18    9               on   11
19   11   to the left of    0