regex - Match everything that isn't a number followed by a letter -

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Sorry if this was answered elsewhere - I did some search and did not find the answer.

Suppose I have a text file that contains a bunch of content that contains a business code, which is always in the format of the numbers after a capital letter.

How can I just remove the oak code from the file? In plain English, I want to remove everything in the file that does not match the number-capital_lighter pattern.

You can / (\ d + [AZ]) /


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