\w{4}a Unicode word character, repeated exactly 4 times
-Mthe literal text -M (case insensitive) \d{3}a Unicode decimal digit, repeated exactly 3 times
-Nthe literal text -N (case insensitive) \d{2}a Unicode decimal digit, repeated exactly 2 times
-Pthe literal text -P (case insensitive) \da Unicode decimal digit
-Vthe literal text -V (case insensitive) \da Unicode decimal digit
-the literal - (4510 / 558 / 2D16)
\wa Unicode word character
\da Unicode decimal digit
Athe literal A (6510 / 1018 / 4116) (case insensitive)
\da Unicode decimal digit