What color do you think the letters are?
The letters are white.
    src        edge_attr  dst
0     0  to the right of    5
1     0  to the right of    3
2     0             near    1
3     1             near    3
4     1             near    0
5     1  to the right of    3
6     2   to the left of    6
7     2   to the left of    5
8     2   to the left of    3
9     3             near    1
10    3               on    0
11    3               on    2
12    3  to the right of    6
13    3   to the left of    1
14    3   to the left of    0
15    3  to the right of    5
16    3  to the right of    2
17    5   to the left of    0
18    5   to the left of    3
19    5  to the right of    2
20    6   to the left of    3
21    6  to the right of    2
22    6               on    5