Is the tower brown or silver?
The tower is brown.
    src        edge_attr  dst
0     0  to the right of    8
1     0  to the right of    4
2     1  to the right of    8
3     1  to the right of    4
4     4   to the left of    7
5     4   to the left of    6
6     4   to the left of    0
7     4   to the left of   11
8     4   to the left of    1
9     6  to the right of    8
10    6  to the right of    4
11    7  to the right of    8
12    7  to the right of    4
13    8   to the left of    0
14    8   to the left of    1
15    8   to the left of    6
16    8   to the left of    7
17    8   to the left of   11
18   11  to the right of    4
19   11  to the right of    8
20   12   to the left of   15
21   12   to the left of   14
22   12   to the left of   13
23   13  to the right of   12
24   13   to the left of   16
25   13   to the left of   15
26   13   to the left of   14
27   14   to the left of   15
28   14  to the right of   13
29   14  to the right of   12
30   14   to the left of   16
31   15  to the right of   13
32   15  to the right of   14
33   15  to the right of   12
34   15   to the left of   16
35   16  to the right of   14
36   16  to the right of   15
37   16  to the right of   13