What is on the shelf?
The toiletries are on the shelf.
    src        edge_attr  dst
0     2   to the left of    9
1     2   to the left of   15
2     4   to the left of    9
3     4   to the left of   14
4     5  to the right of   15
5     5  to the right of    9
6     5   to the left of   13
7     6   to the left of   17
8     7               on    8
9     7               on    2
10    9   to the left of   13
11    9  to the right of    2
12    9   to the left of    5
13    9  to the right of    4
14   10   to the left of   18
15   10   to the left of   15
16   12  to the right of   20
17   12  to the right of   17
18   13  to the right of    9
19   13  to the right of    5
20   13  to the right of   15
21   14  to the right of    4
22   15   to the left of   13
23   15  to the right of    2
24   15  to the right of   10
25   15   to the left of    5
26   17               on   20
27   17  to the right of    6
28   17   to the left of   12
29   18  to the right of   10
30   19               on    1
31   20   to the left of   12