What device isn't silver?
The device is a keyboard.
    src        edge_attr  dst
0     0   to the left of    3
1     0   to the left of    1
2     1  to the right of    0
3     1  to the right of    7
4     1  to the right of    3
5     1  to the right of    2
6     2   to the left of    1
7     3  to the right of    0
8     3   to the left of    1
9     6       sitting on    0
10    7   to the left of    1