What device is on the left of the computer mouse?
The device is a calculator.
    src        edge_attr  dst
0     0   to the left of   12
1     0  to the right of    2
2     0  to the right of    9
3     2   to the left of    0
4     3   to the left of    4
5     3  to the right of    5
6     3   to the left of   12
7     3  to the right of   15
8     3   to the left of   10
9     4   to the left of    8
10    4   to the left of    6
11    4   to the left of    7
12    4   to the left of   12
13    4  to the right of    5
14    4  to the right of    3
15    4   to the left of   10
16    5   to the left of    3
17    5   to the left of    4
18    5   to the left of   10
19    5   to the left of   11
20    6        on top of    7
21    6  to the right of   10
22    6        on top of    8
23    6  to the right of    4
24    7  to the right of    4
25    8  to the right of    4
26    9   to the left of    0
27   10   to the left of   12
28   10  to the right of    5
29   10   to the left of    6
30   10  to the right of    4
31   10  to the right of    3
32   11  to the right of    5
33   12  to the right of   10
34   12  to the right of    0
35   12  to the right of    3
36   12  to the right of    4
37   12  to the right of   14
38   14   to the left of   12
39   15   to the left of    3