What is he doing?
The man is brushing teeth.
    src        edge_attr  dst
0     0  to the right of    7
1     1  to the right of    7
2     1  to the right of    8
3     4  to the right of    5
4     5  to the right of   12
5     5   to the left of    4
6     7   to the left of    0
7     7   to the left of    1
8     7   to the left of    9
9     8   to the left of    1
10    8   to the left of    9
11    9  to the right of    7
12    9  to the right of    8
13   10  to the right of   12
14   12   to the left of    5
15   12   to the left of   10