update readme, for format

huangmingming

2023-01-30 f807bc2c06f8e1fd220f72ebeb346d63ff7d6882

1
2
3
4
5
6
7
8
9
X    1
XX    2
XXX    3
XL    4
L    5
LX    6
LXX    7
LXXX    8
XC    9