Is the curtain on the left side?
Yes, the curtain is on the left of the image.
    src        edge_attr  dst
0     0  to the right of   20
1     0  to the right of   15
2     0  to the right of   16
3     0  to the right of    9
4     0  to the right of   10
5     0  to the right of    4
6     0  to the right of   17
7     2   to the left of   14
8     4   to the left of    0
9     4   to the left of   15
10    4   to the left of   14
11    5  to the right of   16
12    5  to the right of    9
13    6   to the left of   14
14    8  to the right of   19
15    9   to the left of   12
16    9   to the left of    0
17    9   to the left of    5
18    9   to the left of   19
19    9   to the left of   14
20   10   to the left of   14
21   10   to the left of    0
22   11   to the left of   14
23   12  to the right of   16
24   12  to the right of    9
25   14  to the right of   11
26   14  to the right of    4
27   14  to the right of    2
28   14  to the right of    6
29   14  to the right of   10
30   14  to the right of   20
31   14  to the right of   17
32   14  to the right of   15
33   14  to the right of   18
34   14  to the right of    9
35   14  to the right of   16
36   15   to the left of    0
37   15  to the right of    4
38   15   to the left of   14
39   16   to the left of    5
40   16   to the left of    0
41   16   to the left of   14
42   16   to the left of   19
43   16   to the left of   12
44   17   to the left of   14
45   17   to the left of    0
46   18   to the left of   14
47   19  to the right of    9
48   19   to the left of    8
49   19  to the right of   16
50   20   to the left of    0
51   20   to the left of   14