Find the missing permutation: Difference between revisions

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 <pre>
-ABCD
+          ABCD
-CABD
+          CABD
-ACDB
+          ACDB
-DACB
+          DACB
-BCDA
+          BCDA
-ACBD
+          ACBD
-ADCB
+          ADCB
-CDAB
+          CDAB
-DABC
+          DABC
-BCAD
+          BCAD
-CADB
+          CADB
-CDBA
+          CDBA
-CBAD
+          CBAD
-ABDC
+          ABDC
-ADBC
+          ADBC
-BDCA
+          BDCA
-DCBA
+          DCBA
-BACD
+          BACD
-BADC
+          BADC
-BDAC
+          BDAC
-CBDA
+          CBDA
-DBCA
+          DBCA
-DCAB
+          DCAB
 </pre>
 Listed above are all of the permutations of the symbols &nbsp; '''A''', &nbsp; '''B''', &nbsp; '''C''', &nbsp; and &nbsp; '''D''', &nbsp; ''except'' &nbsp; for one permutation that's &nbsp; ''not'' &nbsp; listed.