What are the letters on?
The letters are on the shoe.
    src        edge_attr  dst
0     0  to the right of    6
1     0  to the right of    2
2     1               on   10
3     1   to the left of   11
4     1   to the left of    7
5     2   to the left of    0
6     2           behind   11
7     2  to the right of   10
8     3  to the right of    9
9     4  to the right of    5
10    4  to the right of    9
11    4  to the right of   11
12    5               of   11
13    5   to the left of    8
14    5  to the right of   10
15    5  to the right of    7
16    5   to the left of    4
17    6               of   11
18    6  to the right of   10
19    6   to the left of    0
20    7               on   10
21    7  to the right of    1
22    7   to the left of    5
23    7   to the left of    8
24    7   to the left of   11
25    8  to the right of    5
26    8  to the right of   11
27    8  to the right of    9
28    8  to the right of    7
29    8  to the right of   10
30    9   to the left of    8
31    9   to the left of    4
32    9   to the left of    3
33    9      in front of   11
34   10   to the left of    2
35   10   to the left of   11
36   10   to the left of    8
37   10   to the left of    5
38   10   to the left of    6
39   11           behind    9
40   11      in front of    2
41   11  to the right of   10
42   11  to the right of    1
43   11   to the left of    4
44   11   to the left of    8
45   11  to the right of    7
46   11           around    8