.any character (except for line terminators)
AA/BHJthe literal text AA/BHJ (case sensitive) \.the literal . (4610 / 568 / 2E16)
S,the literal text S, (case sensitive) \d+a digit, repeated at least once
\s+any whitespace character, repeated at least once
\d+a digit, repeated at least once
Non-Capturing Group(?:\.\d+)? ?repeats the group contents below at most once:
\.the literal . (4610 / 568 / 2E16)
\d+a digit, repeated at least once
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