*repeats the group contents below any number of times:
,the literal , (4410 / 548 / 2C16)
?optionally matches the literal (3210 / 408 / 2016)
+matches at least one character from the set below:
0-9one character from 0 (4810) to 9 (5710)
*matches any number of characters from the set below:
a-zone character from a (9710) to z (12210) (case sensitive)
A-Zone character from A (6510) to Z (9010) (case sensitive)