\d+a Unicode decimal digit, repeated at least once
\s*a Unicode whitespace character, repeated any number of times
Non-Capturing Group(?:Apple|Banana|Orange|Pineapple) Applethe literal text Apple (case insensitive) Bananathe literal text Banana (case insensitive) Orangethe literal text Orange (case insensitive) Pineapplethe literal text Pineapple (case insensitive) s?optionally matches the literal s (11510 / 1638 / 7316) (case insensitive)
\ba Unicode word boundary