Has anyone come up with a regex solution to the DNA pair problem?

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Trying to see if you found some regex solutions, trying to improve my regex skills

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Challenge: DNA Pairing

Link to the challenge:

It’s not a particularly good place to use regex because the only possible input is a string of arbitrary length containing some combination of four characters in some arbitrary order, using regex will massively overcomplicate the task. You don’t need to find a pattern (which is the purpose of regex), you need to iterate through the characters and do something for each one (which regex is not at all designed to do)

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