Regular Expressions 101

Positive Lookahead(?=\b(?:Что|в)\b)

\ba Unicode word boundary

Non-Capturing Group(?:Что|в)

1st AlternativeЧто

Чтоthe literal text Что (case insensitive)

2nd Alternativeв

вthe literal в (1074₁₀ / 2062₈ / 432₁₆) (case insensitive)

\ba Unicode word boundary

Group 1(.{5})

.{5}any Unicode character (except for line terminators), repeated exactly 5 times

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

u modifier: unicode. Treats the pattern and subject as UTF-16

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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

(?=\b(?:Что|в)\b)(.{5})

Hi How Are you
Привет! Как дела, что делаешь? Не ходи в кино!
а наши люди в булочную на такси не ездят
Hi How Are you