\ba Unicode word boundary
\d+a Unicode decimal digit, repeated at least once
\s+a Unicode whitespace character, repeated at least once
{3}matches exactly 3 characters from the set below:
A-Zone character from A (6510) to Z (9010) (case sensitive)
\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