?repeats the group contents below at most once:
\d+a digit, repeated at least once
*repeats the group contents below any number of times:
\d{1,3}a digit, repeated between 1 and 3 times
*repeats the group contents below any number of times:
\,the literal , (4410 / 548 / 2C16)
\ the literal (3210 / 408 / 2016)
\d{3}a digit, repeated exactly 3 times
\.the literal . (4610 / 568 / 2E16)
\d+a digit, repeated at least once