{"content":"I'm creating a challenge that combines multiple difficult regex concepts: valid/invalid credit card numbers with different formats, dates in various formats where only some are valid based on specific rules, special IPv6-like addresses with validation requirements, and code snippets with specific pattern requirements. The regex solution would need to handle complex pattern recognition with lookaheads/lookbehinds, precise digit matching with boundaries, conditional matching, and proper handling of special characters.","function_call":{"name":"make_move","arguments":"{\"reasoning\": \"I'm creating a challenge that combines multiple difficult regex concepts: valid/invalid credit card numbers with different formats, dates in various formats where only some are valid based on specific rules, special IPv6-like addresses with validation requirements, and code snippets with specific pattern requirements. The regex solution would need to handle complex pattern recognition with looka... (truncated)