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Source Regular Expression ^(?>[A-Z]{2}|\d\d)-(?>[A-Z]{2}|\d\d)-(?<!\d\d-\d\d-)\d\d$|^(?>[A-Z]{2}|\d\d)-(?>[A-Z]{2}|\d\d)-(?<![A-Z]{2}-[A-Z]{2}-)[A-Z]{2}$|^\d\d-[A-Z]{3}-\d$
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