regex101: Python Match Workspace

\ba Unicode word boundary

lack the literal text lack (case sensitive)

Negative Lookahead(?!lack\b)

lackthe literal text lack (case sensitive)

\ba Unicode word boundary

\w+a Unicode word character, repeated at least once

Non-Capturing Group(?:[^\w,](?!lack\b)\w+){0,2}

{0,2}repeats the group contents below between 0 and 2 times:

Negated Character Class[^\w,]

\wa Unicode word character

,the literal , (44₁₀ / 54₈ / 2C₁₆)

Negative Lookahead(?!lack\b)

lackthe literal text lack (case sensitive)

\ba Unicode word boundary

\w+a Unicode word character, repeated at least once

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

25 tokens

Regular Expression

\black (?!lack\b)\w+(?:[^\w,](?!lack\b)\w+){0,2}

New

lack of stair handrails, slippery surfaces, tripping hazards, lack of bathroom grab bars, lack floor

lack lack stair handrails, slippery surfaces, tripping hazards, lack of bathroom lack bars, lack floor, lack lack

Substitution

lack of stair handrails, slippery surfaces, tripping hazards, lack of bathroom grab bars, lack floor

lack lack stair handrails, slippery surfaces, tripping hazards, lack of bathroom lack bars, lack floor, lack lack