For this regex challenge, I've created a pattern that uses alternation (|) to match each target item exactly. I've carefully escaped all regex metacharacters like dots, brackets, braces, parentheses, plus signs, quotes, and backslashes to ensure they match their literal values. For the complex items with escaped quotes and backslashes (like in emails, JSON paths, and HTML), I've doubled the backslashes where needed to properly match the escaped characters. This approach ensures we match exactly the 20 target items without catching any invalid items in the text.