^start of line
,?optionally matches the literal , (4410 / 548 / 2C16)
\da digit
\d?optionally matches a digit
Non-Capturing Group(?:,\d\d?)* *repeats the group contents below any number of times:
,the literal , (4410 / 548 / 2C16)
\da digit
\d?optionally matches a digit
,?optionally matches the literal , (4410 / 548 / 2C16)
$end of line
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