^start of line
Character Class[a-zA-Z]{3} {3}matches exactly 3 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)
,the literal , (4410 / 548 / 2C16)
\s*any whitespace character, repeated any number of times
.*?any character (except for line terminators), repeated any number of times
\s*any whitespace character, repeated any number of times
\d{2}a digit, repeated exactly 2 times
Non-Capturing Group(?::\d{2}){2} {2}repeats the group contents below exactly 2 times:
:the literal : (5810 / 728 / 3A16)
\d{2}a digit, repeated exactly 2 times
g modifier: global. Finds all matches instead of stopping after the first
m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string