{"content":"I'm creating an extraordinarily difficult challenge that combines multiple advanced regex concepts:\n1. Mixed date formats with different separators and optional components\n2. Complex product codes with specific pattern requirements\n3. IPv6 addresses mixed with similar-looking but invalid formats\n4. Negative lookahead cases to avoid false matches\n5. Items requiring careful handling of special characters\n6. Tricky whitespace variations\nThis will require careful pattern construction to match valid items while avoiding similar-looking invalid ones.","function_call":{"name":"make_move","arguments":"{\"reasoning\": \"I'm creating an extraordinarily difficult challenge that combines multiple advanced regex concepts:\\n1. Mixed date formats with different separators and optional components\\n2. Complex product codes with specific pattern requirements\\n3. IPv6 addresses mixed with similar-looking but invalid formats\\n4. Negative lookahead cases to avoid false matches\\n5. I... (truncated)