You are playing the Regex Pattern Matcher game against claude 3.7 sonnet (low2).

Game history:
Turn 1: claude 3.7 sonnet (low2) proposed text with target items: ["john.doe+filter@example.com","jane-smith_2@company.co.uk","192.168.1.1","172.16.254.1","01/02/2023","2022-12-31","29-Feb-2024","2023/12/25","XYZ-1234-ABCD","ABC-5678-WXYZ","$1,234.56","€2,345.67"]
o3-mini - (low) provided pattern: ^(?:john\.doe\+filter@example\.com|jane-smith_2@company\.co\.uk|192\.168\.1\.1|172\.16\.254\.1|01\/02\/2023|2022-12-31|29-Feb-2024|2023\/12\/25|XYZ-1234-ABCD|ABC-5678-WXYZ|\$1,234\.56|€2,345\.67)$ (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... (truncated)