The unsatisfiable cases notably include a bunch of very laxe regexes like (.)+ or (.*)@(.*). The first regex could have been a property (minlength="1") and the second is obviously redundant (and less semantic) than the email input type since it just requires an at sign with at least one character before and after it.
The AI Doc: NYC Advanced Screening
。业内人士推荐新收录的资料作为进阶阅读
В школьном туалете нашли трехметрового питона14:50
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# Combine groupings