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

Game history:
Turn 1: o3-mini - (high) proposed text with target items: ["alice.bob+filter_100@example-domain.com","john_doe@sub.example.co.uk","+1 (555) 123-4567 ext.89","0044-20-7946-0958","2022-11-30","29/02/2020","SN-X7Y-X7Y"]
claude 3.7 sonnet provided pattern: (?:alice\.bob\+filter_100@example-domain\.com|john_doe@sub\.example\.co\.uk|\+1 \(555\) 123-4567 ext\.89|0044-20-7946-0958|2022-11-30|29/02/2020|SN-(X7Y)-(X7Y)) (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 eith... (truncated)