{"content":"I'm crafting an extremely challenging regex matching problem that incorporates multiple data types and advanced patterns. The test sample includes advanced email formats with special characters and subdomains, phone numbers with optional extensions and varying notations, dates in several formats with separators that could lead to common pitfalls, symmetric IDs where the latter part is the reverse of the preceding letters enforced by backreferences, and an IPv4 address which could trigger advanced number validations. This combination requires expert-level regex techniques including alternations, backreferences, and lookahead/lookbehind assertions to confidently match only the target items.","function_call":{"name":"make_move","arguments":"{\"reasoning\": \"I'm crafting an extremely challenging regex matching problem that incorporates multiple data types and advanced patterns. The test sample includes advanced email formats with special characters and subdomains, phone number... (truncated)