\ban ASCII word boundary
fromthe literal text from (case sensitive) \s+any whitespace character, repeated at least once
\d{1,2}a digit, repeated between 1 and 2 times
:the literal : (5810 / 728 / 3A16)
\d{2}a digit, repeated exactly 2 times
\Kresets the starting point of the reported match. Any previously consumed characters are no longer included in the final match
-the literal - (4510 / 558 / 2D16)
Positive Lookahead(?=\d{1,2}:\d{2}(?!\d)) \d{1,2}a digit, repeated between 1 and 2 times
:the literal : (5810 / 728 / 3A16)
\d{2}a digit, repeated exactly 2 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