Does that counter look high?
Yes, the counter is high.
    src        edge_attr  dst
0     0  to the right of   19
1     0   to the left of    9
2     0   to the left of    3
3     0   to the left of   16
4     1   to the left of    9
5     1  to the right of   19
6     2   to the left of   11
7     2   to the left of    5
8     2   to the left of   13
9     3  to the right of   19
10    3  to the right of    0
11    3   to the left of   16
12    4  to the right of   15
13    4  to the right of   18
14    5  to the right of    2
15    5  to the right of   19
16    5   to the left of   13
17    7  to the right of   15
18    7               on    4
19    7  to the right of    9
20    9  to the right of    1
21    9  to the right of    0
22    9   to the left of   16
23    9  to the right of   19
24    9   to the left of    7
25   10               on    4
26   10  to the right of   15
27   11  to the right of    2
28   11   to the left of   13
29   12  to the right of   18
30   12  to the right of   15
31   13  to the right of    5
32   13  to the right of   11
33   13  to the right of    2
34   14   to the left of   18
35   15   to the left of    4
36   15   to the left of    7
37   15  to the right of   18
38   15   to the left of   10
39   15   to the left of   12
40   15   to the left of   17
41   16  to the right of    9
42   16  to the right of   19
43   16               in   15
44   16  to the right of    0
45   16  to the right of    3
46   17               on    4
47   17  to the right of   15
48   18   to the left of   15
49   18  to the right of   14
50   18   to the left of    4
51   18   to the left of   12
52   19   to the left of    0
53   19   to the left of   16
54   19   to the left of    3
55   19   to the left of    1
56   19   to the left of    5
57   19   to the left of    9