Regex Roulette · #27 · 2026-05-01
Match strings with a repeated word
Difficulty 3/3
How to play
Write a regex that matches all green strings and rejects all red strings. Live feedback shows which strings pass. Shorter patterns score better.
Must match
- the the — not yet evaluated
- is is bad — not yet evaluated
- go go go — not yet evaluated
Must not match
- the cat — not yet evaluated
- no repeats — not yet evaluated
- these those — not yet evaluated
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Pattern body only — slashes and flags (e.g. /g, /i) aren't part of the input.
0/200 chars
Type a regex that matches all green strings and rejects all red strings · Back to hub