{"content":"I'm creating an extremely difficult challenge that combines multiple complex pattern types: \n1. Valid IPv4 addresses that must be in private IP ranges only (10.x.x.x, 172.16-31.x.x, or 192.168.x.x)\n2. Credit card numbers that pass Luhn validation but only for specific card types (only Visa and Amex)\n3. Valid URLs with specific query parameters\n4. Complex date formats with inconsistent separators\n5. Product codes with specific validation rules\n\nThe text includes numerous near-matches and edge cases that would trip up naive regex approaches. The challenge requires combining lookaheads/lookbehinds, backreferences, careful boundary checking, and format validation.","function_call":{"name":"make_move","arguments":"{\"reasoning\": \"I'm creating an extremely difficult challenge that combines multiple complex pattern types: \\n1. Valid IPv4 addresses that must be in private IP ranges only (10.x.x.x, 172.16-31.x.x, or 192.168.x.x)\\n2. Credit card numbers that pass Luhn vali... (truncated)