{"content":"I'm creating an extremely difficult challenge that combines multiple pattern types with subtle variations. This includes:\n1. Valid IPv4 addresses (but not similar-looking invalid ones)\n2. Product codes with specific validation rules\n3. Valid URLs with different protocols\n4. Date formats with specific constraints\n5. Credit card patterns with validation characters\n6. Base64 encoded strings of specific length\n7. MD5 hashes\nThe text contains many near-matches and distractors that should be excluded, making naive pattern matching approaches fail. The challenge requires techniques like lookaheads, lookbehinds, precise character class restrictions, and carefully managed alternations.","function_call":{"name":"make_move","arguments":"{\"reasoning\": \"I'm creating an extremely difficult challenge that combines multiple pattern types with subtle variations. This includes:\\n1. Valid IPv4 addresses (but not similar-looking invalid ones)\\n2. Product codes with specific valida... (truncated)