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External Data Source

Source

Regular Expression
((?=[^147]*([147][^147]*[147][^147]*[147][^147]*)*$)[^258]*([258][^258]*[258][^258]*[258][^258]*)*)|((?=[^147]*([147][^147]*[147][^147]*[147][^147]*)*[147][^147]*$)[^258]*([258][^258]*[258][^258]*[258][^258]*)*[258][^258]*)|((?=[^147]*([147][^147]*[147][^147]*[147][^147]*)*[147][^147]*[147][^147]*$)[^258]*([258][^258]*[258][^258]*[258][^258]*)*[258][^258]*[258][^258]*)