Are the papers covered?
Yes, the papers are covered.
    src        edge_attr  dst
0     0   to the left of    7
1     1  to the right of   10
2     1  to the right of    6
3     1  to the right of    2
4     2   to the left of    9
5     2   to the left of    1
6     2   to the left of    7
7     3  to the right of    5
8     3  to the right of    4
9     4   to the left of    3
10    5   to the left of    3
11    6   to the left of    1
12    7  to the right of    0
13    7  to the right of    2
14    7  to the right of    8
15    8   to the left of    7
16    9  to the right of    2
17   10   to the left of    1