Is the shelf on the left or on the right?
The shelf is on the right of the image.
    src        edge_attr  dst
0     1  to the right of   15
1     3  to the right of    7
2     4  to the right of    7
3     5  to the right of    7
4     6  to the right of    7
5     7   to the left of   18
6     7  to the right of   15
7     7   to the left of    4
8     7   to the left of    3
9     7   to the left of   11
10    7   to the left of   16
11    7   to the left of    5
12    7   to the left of    6
13    8  to the right of   15
14    8   on the side of    2
15    8  to the right of   10
16    9  to the right of   10
17    9  to the right of   17
18   10   to the left of    9
19   10   to the left of    8
20   10   to the left of   14
21   10   to the left of   13
22   11  to the right of    7
23   13  to the right of   10
24   13  to the right of   17
25   13  to the right of   15
26   14  to the right of   10
27   14  to the right of   17
28   15   to the left of   13
29   15   to the left of    8
30   15   to the left of    1
31   15   to the left of    7
32   16  to the right of    7
33   17   to the left of   14
34   17   to the left of   13
35   17   to the left of    9
36   18  to the right of    7