What is the size of the mirror?
The mirror is large.
    src        edge_attr  dst
0     0  to the right of    9
1     0               on    2
2     0   to the left of    4
3     0  to the right of    7
4     1  to the right of    7
5     1   to the left of    4
6     2  to the right of    7
7     4  to the right of    0
8     4  to the right of    7
9     4  to the right of    1
10    6  to the right of    7
11    7   to the left of    1
12    7   to the left of    6
13    7   to the left of    0
14    7   to the left of    4
15    7   to the left of    2
16    9   to the left of    0