Do you see clocks or windows there?
Yes, there is a window.
    src        edge_attr  dst
0     0  to the right of   16
1     0   to the left of   11
2     0  to the right of   17
3     1  to the right of    8
4     1   to the left of    2
5     2   to the left of    4
6     2  to the right of    3
7     2  to the right of    1
8     2  to the right of    8
9     3   to the left of    2
10    3  to the right of    8
11    3   to the left of    4
12    4  to the right of    3
13    4  to the right of    2
14    5   to the left of   13
15    6   to the left of   15
16    6   to the left of   17
17    7   to the left of   14
18    7  to the right of   13
19    8   to the left of    2
20    8   to the left of    1
21    8   to the left of    3
22    9           behind   13
23    9           behind   14
24   11  to the right of    0
25   11  to the right of   18
26   11  to the right of   16
27   13      in front of    9
28   13   to the left of    7
29   13  to the right of    5
30   14      in front of    9
31   14  to the right of    7
32   15  to the right of    6
33   16   to the left of    0
34   16   to the left of   11
35   16  to the right of   17
36   16   to the left of   18
37   17   to the left of   16
38   17   to the left of   18
39   17   to the left of    0
40   17  to the right of    6
41   18  to the right of   17
42   18   to the left of   11
43   18  to the right of   16