Where is the sand?
The sand is on the sea shore.
    src        edge_attr  dst
0     0  to the right of    3
1     0   to the left of   11
2     1  to the right of    7
3     1   to the left of   11
4     3   to the left of    0
5     3   to the left of   11
6     4   to the left of   11
7     4  to the right of    5
8     4  to the right of   12
9     5  to the right of    7
10    5   to the left of    4
11    7          holding   12
12    7   to the left of    5
13    7   to the left of   12
14    7   to the left of    1
15    8   to the left of   12
16    9   to the left of   12
17   10               on    6
18   11  to the right of    0
19   11  to the right of   13
20   11  to the right of    1
21   11  to the right of    3
22   11  to the right of    4
23   12  to the right of    9
24   12   to the left of    4
25   12  to the right of    7
26   12  to the right of    8
27   13   to the left of   11