regex101: PCRE (Legacy) Match Workspace

Group 1((?=\b(?:[a-df-z0-9_]*e[a-df-z0-9_]*){2}\b)(?=\b(?:[b-z0-9_]*a[b-z0-9_]*){1,3}\b).+)

Positive Lookahead(?=\b(?:[a-df-z0-9_]*e[a-df-z0-9_]*){2}\b)

\ban ASCII word boundary

Non-Capturing Group(?:[a-df-z0-9_]*e[a-df-z0-9_]*){2}

{2}repeats the group contents below exactly 2 times:

Character Class[a-df-z0-9_]*

*matches any number of characters from the set below:

a-done character from a (97₁₀) to d (100₁₀) (case insensitive)

f-zone character from f (102₁₀) to z (122₁₀) (case insensitive)

0-9one character from 0 (48₁₀) to 9 (57₁₀)

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

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

Character Class[a-df-z0-9_]*

*matches any number of characters from the set below:

a-done character from a (97₁₀) to d (100₁₀) (case insensitive)

f-zone character from f (102₁₀) to z (122₁₀) (case insensitive)

0-9one character from 0 (48₁₀) to 9 (57₁₀)

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

\ban ASCII word boundary

Positive Lookahead(?=\b(?:[b-z0-9_]*a[b-z0-9_]*){1,3}\b)

\ban ASCII word boundary

Non-Capturing Group(?:[b-z0-9_]*a[b-z0-9_]*){1,3}

{1,3}repeats the group contents below between 1 and 3 times:

Character Class[b-z0-9_]*

*matches any number of characters from the set below:

b-zone character from b (98₁₀) to z (122₁₀) (case insensitive)

0-9one character from 0 (48₁₀) to 9 (57₁₀)

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

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

Character Class[b-z0-9_]*

*matches any number of characters from the set below:

b-zone character from b (98₁₀) to z (122₁₀) (case insensitive)

0-9one character from 0 (48₁₀) to 9 (57₁₀)

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

\ban ASCII word boundary

.+any character (except for line terminators), repeated at least once

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

Search reference

Regular Expression

((?=\b(?:[a-df-z0-9_]*e[a-df-z0-9_]*){2}\b)(?=\b(?:[b-z0-9_]*a[b-z0-9_]*){1,3}\b).+)

New

a eea
oe
eeae
alargedonkey
thebiggestmushroom
cheese
acheese
cheesy
cheesybread
cheesyapp
alphabetchocolate
alphabetonaplate
ayellowalphabetonaplate