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Regex not proceeded or followed by a -


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I have the above expression, which will match the specified characters (with the specified length) and optionally a fullstop followed by more specified characters (with the specified length).


Im trying to make it so it matches only if its not proceeded by a - and not followed by a - .


So example the following will match:






However the following will not match:






I've tried using (?<!\-) (not proceeded by -) and (?!\-) (not followed by -) but that doesn't seem to work?  :wtf:

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