On which side is the tower?
The tower is on the right of the image.
    src        edge_attr  dst
0     0  to the right of    4
1     0  to the right of    1
2     1   to the left of    6
3     1   to the left of    0
4     1  to the right of    4
5     2   to the left of    6
6     4   to the left of    1
7     4   to the left of    0
8     4   to the left of    6
9     6  to the right of    4
10    6  to the right of    2
11    6  to the right of    1
12    7   to the left of   10
13    7   to the left of    9
14    9  to the right of    7
15   10  to the right of    7