Is the crust wet or dry?
The crust is dry.
    src        edge_attr  dst
0     0  to the right of    2
1     0  to the right of    6
2     2   to the left of    0
3     2   to the left of    9
4     5   to the left of    8
5     6   to the left of    9
6     6   to the left of    0
7     8  to the right of    5
8     9  to the right of    6
9     9  to the right of    2
10   10               on    4
11   11               on    1