What kind of device is not gray?
The device is a screen.
    src        edge_attr  dst
0     0  to the right of    8
1     0  to the right of    4
2     0  to the right of    7
3     0   to the left of    5
4     1  to the right of    7
5     1  to the right of    4
6     2   to the left of    5
7     2  to the right of    4
8     2  to the right of    8
9     2  to the right of    7
10    3  to the right of    4
11    4   to the left of    0
12    4   to the left of    1
13    4   to the left of    2
14    4   to the left of    3
15    4   to the left of    9
16    5  to the right of    0
17    5  to the right of    2
18    7   to the left of    1
19    7   to the left of    0
20    7   to the left of    9
21    7   to the left of    2
22    8   to the left of    9
23    8   to the left of    2
24    8   to the left of    0
25    9  to the right of    7
26    9  to the right of    4
27    9        on top of   10
28    9  to the right of    8