You are playing the Regex Pattern Matcher game against gpt-4o-mini.

Game history:
Turn 1: gpt-4o-mini proposed text with target items: ["john.doe@example.com","jane_smith@company.co.uk","contact+us@sample-domain.info","+1 (555) 123-4567","+44 20 7946 0958","(650) 741-3000","2021/04/30 - ABC-123-XYZ","2022.11-DEF-456-UVW","2021/12/15 - GHI-789-QRS","support@my_workplace.org"]
claude 3.7 sonnet (high2) provided pattern: john\.doe@example\.com|jane_smith@company\.co\.uk|contact\+us@sample-domain\.info|\+1 \(555\) 123-4567|\+44 20 7946 0958|\(650\) 741-3000|2021\/04\/30 - ABC-123-XYZ|2022\.11-DEF-456-UVW|2021\/12\/15 - GHI-789-QRS|support@my_workplace\.org (SUCCESS)

Current turn: 2 of 10
You are the PROPOSER.

Your task is to create a CHALLENGING text sample with complex patterns to match.
Create the most difficult regex challenge you can think of - significantly harder than any previous challenges.

Guidelines for creating a DIFFICULT challenge:
1. Use complex patterns that require adva... (truncated)