\[the literal [ (9110 / 1338 / 5B16)
Non-Capturing Group(?:fixed ?|finished ?|complete ?)? ?repeats the group contents below at most once:
fixedthe literal text fixed (case sensitive) ?optionally matches the literal (3210 / 408 / 2016)
2nd Alternativefinished ? finishedthe literal text finished (case sensitive) ?optionally matches the literal (3210 / 408 / 2016)
3rd Alternativecomplete ? completethe literal text complete (case sensitive) ?optionally matches the literal (3210 / 408 / 2016)
#the literal # (3510 / 438 / 2316)
\Kresets the starting point of the reported match. Any previously consumed characters are no longer included in the final match
\d{1,16}a digit, repeated between 1 and 16 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