ABCD
ABDC
ACDB
ACBD
ADBC
ADCB
BADC
BACD
BCDA
BCAD
BDCA
BDAC
CABD
CADB
CBAD
CBDA
CDAB
CDBA
DABC
DACD
DBCA
DBAC
DCAB
DCBA
4 factorial = 4 x 3 x 2 x 1 = 24
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raisesiresrises------------------------------------They can be arranged in 5!=120 ways.
18
81
52!
5040