\s*a Unicode whitespace character, repeated any number of times
\ba Unicode word boundary
\d{2}a Unicode decimal digit, repeated exactly 2 times
/the literal / (4710 / 578 / 2F16)
\d{2}a Unicode decimal digit, repeated exactly 2 times
/the literal / (4710 / 578 / 2F16)
\d{4}a Unicode decimal digit, repeated exactly 4 times
\d{2}a Unicode decimal digit, repeated exactly 2 times
:the literal : (5810 / 728 / 3A16)
\d{2}a Unicode decimal digit, repeated exactly 2 times
\da Unicode decimal digit