Which kind of device is not silver?
The device is a screen.
    src         edge_attr  dst
0     0    to the left of    7
1     1    to the left of    7
2     3    to the left of    7
3     6    to the left of    8
4     6  on the bottom of    7
5     7   to the right of    0
6     7   to the right of    3
7     7    to the left of   10
8     7   to the right of    1
9     8   to the right of    6
10   10   to the right of    7