What is the color of the striped socks?
The socks are blue.
    src        edge_attr  dst
0     4   to the left of    5
1     4   to the left of    7
2     5  to the right of    4
3     6   to the left of    9
4     7   to the left of   13
5     7  to the right of    4
6     7   to the left of    9
7     8   to the left of    9
8     9  to the right of    7
9     9  to the right of    8
10    9  to the right of    6
11   11   to the left of   14
12   12   to the left of   14
13   13  to the right of    7
14   14  to the right of   11
15   14  to the right of   12