?repeats the group contents below at most once:
\s*any whitespace character, repeated any number of times
-the literal - (4510 / 558 / 2D16)
\s*any whitespace character, repeated any number of times
\d+a digit, repeated at least once
Non-Capturing Group(?:\s*([a-z]+)\s*(\d+))? ?repeats the group contents below at most once:
\s*any whitespace character, repeated any number of times
+matches at least one character from the set below:
a-zone character from a (9710) to z (12210) (case sensitive)
\s*any whitespace character, repeated any number of times
\d+a digit, repeated at least once
Non-Capturing Group(?::(\d+))? ?repeats the group contents below at most once:
:the literal : (5810 / 728 / 3A16)
\d+a digit, repeated at least once