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