Which kind of device is it?
The device is a keyboard.
    src        edge_attr  dst
0     0  to the right of   18
1     0  to the right of    6
2     0  to the right of    9
3     0  to the right of    1
4     0  to the right of   17
5     0  to the right of    7
6     0  to the right of    5
7     1   to the left of    0
8     4  to the right of   18
9     4  to the right of    6
10    5   to the left of    0
11    6   to the left of    4
12    6   to the left of    0
13    7   to the left of    0
14    8  to the right of   18
15    9   to the left of    0
16   10  to the right of   12
17   11  to the right of   14
18   11  to the right of   12
19   12   to the left of   11
20   12   to the left of   14
21   12   to the left of   10
22   13  to the right of   18
23   14   to the left of   11
24   14  to the right of   12
25   15  to the right of   18
26   17   to the left of    0
27   18   to the left of   13
28   18   to the left of   15
29   18   to the left of    8
30   18   to the left of    4
31   18   to the left of    0