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