What's the number on?
The number is on the door.
    src        edge_attr  dst
0     0  to the right of    5
1     0  to the right of   10
2     0            below    1
3     0           behind    3
4     1            above    0
5     1  to the right of   10
6     3  to the right of    5
7     3      in front of    0
8     3  to the right of   10
9     4               on    0
10    5   to the left of    0
11    5   to the left of   11
12    5   to the left of    3
13    6   to the left of    7
14    7  to the right of    6
15    7  to the right of   10
16   10   to the left of    0
17   10   to the left of    1
18   10   to the left of    3
19   10   to the left of   11
20   10   to the left of    7
21   11  to the right of    5
22   11  to the right of   10