\ba Unicode word boundary
A-Zone character from A (6510) to Z (9010) (case sensitive)
.*?any Unicode character (except for line terminators), repeated any number of times
\d{1,2}a Unicode decimal digit, repeated between 1 and 2 times
\.the literal . (4610 / 568 / 2E16)
\d{1,2}a Unicode decimal digit, repeated between 1 and 2 times
\.the literal . (4610 / 568 / 2E16)
\d{2,4}a Unicode decimal digit, repeated between 2 and 4 times
Positive Lookahead(?=\s+[A-Z]|$) \s+a Unicode whitespace character, repeated at least once
A-Zone character from A (6510) to Z (9010) (case sensitive)
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