*repeats the group contents below any number of times:
,the literal , (4410 / 548 / 2C16)
\s*any whitespace character, repeated any number of times
\d+a digit, repeated at least once
?repeats the group contents below at most once:
-the literal - (4510 / 558 / 2D16)
\d*a digit, repeated any number of times