.*any character (except for line terminators), repeated any number of times
\da digit
\D+any character that's not a digit, repeated at least once
\da digit
.*any character (except for line terminators), repeated any number of times
(*SKIP)acts like (*PRUNE), but the next unanchored match attempt starts where (*SKIP) was reached instead of at the next subject character
(*F)forces the current match attempt to fail at this position