Is this a bookcase or a mirror?
This is a mirror.
    src        edge_attr  dst
0     0               on    6
1     0  to the right of    7
2     0  to the right of    4
3     0            above    9
4     0  to the right of    1
5     1   to the left of    0
6     3  to the right of    8
7     3               on    9
8     3   to the left of   10
9     3               by    9
10    4   to the left of    0
11    7   to the left of    0
12    8   to the left of    3
13    8   to the left of   10
14    9  to the right of   12
15    9            below    0
16   10  to the right of    8
17   10  to the right of    3
18   11  to the right of   12
19   12   to the left of   11
20   12   to the left of    9