You are playing the Regex Pattern Matcher game against o1 - (high).

Game history:
Turn 1: o1 - (high) proposed text with target items: ["+1-202-555-0123 x45","(202) 555 0123","03/12/2023","2023-03-12","12-Mar-2023","john_smith+test@sub.domain-example.co.uk","Foobar_99@my-domain.io","#A1-B2-C3","ID: ABC-123-ABC"]
claude 3.7 sonnet (low2) provided pattern: \+1-202-555-0123 x45|\(202\) 555 0123|03\/12\/2023|2023-03-12|12-Mar-2023|john_smith\+test@sub\.domain-example\.co\.uk|Foobar_99@my-domain\.io|#A1-B2-C3|ID: (ABC)-123-\1 (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 n... (truncated)