How wide is the beach that is not unopened?
The beach is wide.
    src        edge_attr  dst
0     0            above   14
1     0   to the left of    4
2     0  to the right of    3
3     0  to the right of    9
4     1   to the left of    3
5     1            above   14
6     1  to the right of    2
7     2   to the left of    1
8     3  to the right of    1
9     3   to the left of    0
10    3   to the left of    9
11    4            above   14
12    4  to the right of    0
13    5  to the right of   12
14    5   to the left of    8
15    7   to the left of    9
16    7  to the right of    8
17    8   to the left of    7
18    8  to the right of    5
19    8  to the right of   12
20    8   to the left of    9
21    9  to the right of    3
22    9   to the left of    0
23    9  to the right of    7
24    9  to the right of    8
25   12   to the left of    5
26   12   to the left of    8