What device is not black?
The device is a keyboard.
    src        edge_attr  dst
0     0   to the left of   10
1     0   to the left of    7
2     0   to the left of    5
3     1   to the left of    5
4     1   to the left of   10
5     1   to the left of    3
6     1   to the left of    7
7     2   to the left of   10
8     3  to the right of    8
9     3  to the right of    1
10    5  to the right of    1
11    5               on    4
12    5  to the right of    0
13    6               on    4
14    7  to the right of    0
15    7  to the right of    1
16    8   to the left of    3
17    8  to the right of    9
18    9   to the left of    8
19   10  to the right of    0
20   10  to the right of    1
21   10  to the right of    2