Is there any sand in this picture that is not full?
Yes, there is empty sand.
    src        edge_attr  dst
0     0   to the left of    7
1     0   to the left of   12
2     0   to the left of   10
3     0   to the left of    9
4     2   to the left of    9
5     3   to the left of    9
6     3  to the right of    6
7     4   to the left of    9
8     4   to the left of   12
9     5   to the left of    9
10    6   to the left of   12
11    6   to the left of   10
12    6   to the left of    3
13    6   to the left of    9
14    7  to the right of    0
15    7   to the left of    9
16    8   to the left of    9
17    9  to the right of    0
18    9  to the right of    7
19    9  to the right of    6
20    9  to the right of    2
21    9  to the right of    3
22    9  to the right of   10
23    9  to the right of   11
24    9  to the right of    8
25    9  to the right of    5
26    9  to the right of   12
27    9  to the right of    4
28   10  to the right of    6
29   10  to the right of    0
30   10   to the left of    9
31   11   to the left of    9
32   12  to the right of    4
33   12  to the right of    6
34   12   to the left of    9
35   12  to the right of    0