Regular Expressions 101

\ban ASCII word boundary

athe literal a (97₁₀ / 141₈ / 61₁₆) (case sensitive)

Negated Character Class[^ex]*?

*?matches any number of characters outside the set below:

ethe literal e (101₁₀ / 145₈ / 65₁₆) (case sensitive)

xthe literal x (120₁₀ / 170₈ / 78₁₆) (case sensitive)

athe literal a (97₁₀ / 141₈ / 61₁₆) (case sensitive)

\ban ASCII word boundary

Global pattern flags

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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

\ba[^ex]*?a\b

New

Есть исходник, не совсем удобный:
"aba aea aca aza axa a-a a#a"