On which side is the gray mat?
The mat is on the left of the image.
    src           edge_attr  dst
0     0  standing on top of    4
1     0      to the left of    8
2     0     to the right of    9
3     0     to the right of    1
4     0     to the right of    6
5     1      to the left of    9
6     1    standing next to    9
7     1      to the left of    0
8     2     to the right of    9
9     3             holding    8
10    3             holding    5
11    3             holding    7
12    5                  in    3
13    6      to the left of    0
14    6      to the left of   11
15    8     to the right of    0
16    9      to the left of    2
17    9     to the right of    1
18    9      to the left of    0
19   11     to the right of    6