What device is black?
The device is a keyboard.
    src        edge_attr  dst
0     0  to the right of    8
1     0             near    1
2     0  to the right of    1
3     0  to the right of    7
4     1             near    0
5     1  to the right of    8
6     1   to the left of    0
7     2   to the left of    9
8     3   to the left of    5
9     5  to the right of    6
10    5  to the right of    3
11    6   to the left of    5
12    7  to the right of    8
13    7   to the left of    0
14    8   to the left of    0
15    8   to the left of    1
16    8   to the left of    7
17    9  to the right of    2