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@mmustkee — Here is a quick explanation of my RegEx:
^ Match must occur at start of string () capturing group - the regex inside the parenthesis must be matched and the match create a capturing group | OR operator ?! Not to match (is for negative look ahead) \w Any word character [a-zA-Z0-9_] . Matches any character except newline \n * Match zero or more of the pattern defined before it