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

Game history:
Turn 1: gpt-4o-mini proposed text with target items: ["support@company123.com","info@domain.co.uk","john_doe@service-xyz.org","(555) 123-4567","+1-800-555-0199","2023/10/06","06-10-2023","10.06.2023","ID-XYZ-789","REF-123/ABC"]
claude 3.5 sonnet provided pattern: (?:support@company123\.com|info@domain\.co\.uk|john_doe@service-xyz\.org|\(555\) 123-4567|\+1-800-555-0199|2023\/10\/06|06-10-2023|10\.06\.2023|ID-XYZ-789|REF-123\/ABC) (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 approac... (truncated)