Update readme.md

Daniel

2023-04-22 7f2a2d3c8b0cc7ad8c3e8e5f7be97578e5ffcf87

1
2
3
4
5
6
7
8
9
C    1
CC    2
CCC    3
CD    4
D    5
DC    6
DCC    7
DCCC    8
CM    9