• Given a set of letters, count all possible palindromes, using all of those letters.
  • For example, if the set is {'A' 'A' 'A'} then the number is 1.
  • If the set is {'A 'A' 'B'} then the number is 1.
  • If the set is {'A' 'B' 'C'} then the number is 0.
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George Berken David Hill minnolina Christian Schröder

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