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

Game history:
Turn 1: o3-mini - (high) proposed text with target items: ["alpha.beta+gamma@delta.co.uk","complex_email-address@sub.domain-example.com","+1 (555) 123-4567","0044-20-7946-0958","2023-07-15","15/07/2023","AB12BA"]
claude 3.7 sonnet (low2) provided pattern: \balpha\.beta\+gamma@delta\.co\.uk\b|\bcomplex_email-address@sub\.domain-example\.com\b|\b\+1 \(555\) 123-4567\b|\b0044-20-7946-0958\b|\b2023-07-15\b|\b15/07/2023\b|\bAB12BA\b (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 app... (truncated)