Regular Expressions 101

Non-Capturing Group(?:(?<=not)|(?<=don't)|(?<=wasn't))

1st Alternative(?<=not)

Positive Lookbehind(?<=not)

notthe literal text not (case sensitive)

2nd Alternative(?<=don't)

Positive Lookbehind(?<=don't)

don'tthe literal text don't (case sensitive)

3rd Alternative(?<=wasn't)

Positive Lookbehind(?<=wasn't)

wasn'tthe literal text wasn't (case sensitive)

\s+a Unicode whitespace character, repeated at least once

Non-Capturing Group(?:number|other|words)

1st Alternativenumber

numberthe literal text number (case sensitive)

2nd Alternativeother

otherthe literal text other (case sensitive)

3rd Alternativewords

wordsthe literal text words (case sensitive)

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.

25 tokens

Regular Expression

(?:(?<=not)|(?<=don't)|(?<=wasn't))\s+(?:number|other|words)

New

not number or don't number and wasn't words