[Cp] regular characters single character
[Abc] matches to a or b or c
Instead [^ ab] matches a or b is not
[AD] matches a or b or c or d
Summed up the character set
\ D is equal to [0-9] [/ cp]
[Cp] regular characters single character
[Abc] matches to a or b or c
Instead [^ ab] matches a or b is not
[AD] matches a or b or c or d
Summed up the character set
\ D is equal to [0-9] [/ cp]