{"text":"Welcome to the ultimate regex gauntlet! \n\nIn this challenge, hidden among layers of text, you will find a series of items that test the very limits of your regex abilities. Beware: there are decoys that might look nearly correct but are not valid targets.\n\nFor instance, you might see an email like first.last@very-deep.sub-domain.example-mail.co or even a split version like first.last+filter@very-deep.sub...(truncated)","targetItems":["first.last+filter@very-deep.sub-domain.example-mail.co.uk","+49 (89) 636-48018","0044-7911-123456","29-02-2024","15.07.2023","07/15/2023","192.168.100.200","fe80::1ff:fe23:4567:890a","987fbc97-4bed-5078-9f07-9141ba07c9f3","U29tZV9TdHJpbmctV2l0aF9feG5ucw==","<div class=\"container\" id=\"main\">Content</div>","function solve(a, b) { return (a+b)*(a-b); }","pattern: (\\w+)-\\1","https://deep.example-domain.com:9090/api/v3/resource?token=abc123XYZ&mode=advanced#section-2","regex test: (?<!\\d)\\d{2,4}(?!\\d)"]}