{"content":"I'm creating an exceptionally challenging regex matching task that involves multiple formats like complex emails with IPv6 literals, phone numbers with extensions, ISO 8601 timestamps, alternative date formats, nested JSON with quotes and escaped characters, URLs with embedded credentials and special characters, semantic versioning with build metadata, and an additional nested JSON structure that includes brackets and quotes. This challenge pushes regex capabilities to advanced levels by mixing different patterns that require careful escaping, lookahead/lookbehind considerations, and precise matching without over-capturing. This is significantly harder than previous challenges.","function_call":{"name":"make_move","arguments":"{\"reasoning\": \"I'm creating an exceptionally challenging regex matching task that involves multiple formats like complex emails with IPv6 literals, phone numbers with extensions, ISO 8601 timestamps, alternative date formats, nested JSON with quote... (truncated)