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ABCD, ABDC, ACBD, ACDB, ADBC, ADCB
BACD, BACD, BCAD, BCDA, BDAC, BDCA
CABD, CADB, CBAD, CBDA, CDAB, CDBA
DABC, DACB, DBAC, DBCA, DCAB, DCBA
ABCD, DBCA, ACBD, DCBA
Juan Caro
