Regex not matching uppercase letters

hello @paul_2273 ,

That’s both normal and not normal at the same time 😉 Your regex is perfectly fine, but if in Dreamweaver the Match case option isn’t checked, the search runs in case-insensitive mode (i). So even [A-Z] will match lowercase letters too.

So, just make sure to mark Match case, and everything will work exactly as expected!

I can't explain why it is picking up "ered" as based on your regex it should not because they are not capital letters to your point. But your match doesn't have a negative lookahead or lookbehind. So because of this, it will look for anywhere there are 3 capital letters, followed by a space, then 3 numbers. Something like this should block out words longer than 3-4 characters ( ([A-Z]{3,4})(?![A-Z])\s\d{3} ) ( https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Regular_expressions/Lookahead_assertion ).