{"content":"I'm creating an extremely difficult challenge requiring advanced regex techniques, including IPv6-based emails, variable phone number formats with optional extensions, multiple date formats (including leap-year considerations), negative lookahead/lookbehind contexts, tricky TLDs (.photography), repeated group patterns, and more. This challenge is designed to push regex skills beyond basic patterns by including near-matching items that must not be matched, forcing precise grouping, alternation, and lookaround logic for a single regex solution.","function_call":{"name":"make_move","arguments":"{\n  \"reasoning\": \"I'm creating an extremely difficult challenge requiring advanced regex techniques, including IPv6-based emails, variable phone number formats with optional extensions, multiple date formats (including leap-year considerations), negative lookahead/lookbehind contexts, tricky TLDs (.photography), repeated group patterns, and more. This challenge is designed to push r... (truncated)