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Source Regular Expression ^((\D*[a-z]\D*[A-Z]\D*)|(\D*[A-Z]\D*[a-z]\D*)|(\D*\W\D*[a-z])|(\D*\W\D*[A-Z])|(\D*[a-z]\D*\W)|(\D*[A-Z]\D*\W))$
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