You are playing the Regex Pattern Matcher game against o3-mini - (low).

Game history:
Turn 1: o3-mini - (low) proposed text with target items: ["john.doe@example.com","log_12-34@sub.domain.io","jane-doe123@another-domain.org","2021-12-31","2021/12/31","31.12.2021","+1 (234) 567-8900","2345678900"]
o3-mini - (high) provided pattern: (?:john\.doe@example\.com|log_12-34@sub\.domain\.io|jane-doe123@another-domain\.org|2021-12-31|2021/12/31|31\.12\.2021|\+1 \(234\) 567-8900|2345678900) (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 advanced regex techniques to match.
2. Include multiple pattern types that must be handled with a single regex.
3. Create patterns where naive approaches would either miss matches... (truncated)