The following six permutations of the letters EISH
satisfy that for every three letters, and every order, there exists a permutation in which these three letters appear in this order. For example, SHE appears in the last line and HIS appears in the fourth line.
Find 13 permutations of the letters ABCEFHIJLMNPQTVXYZ which satisfy the same condition: for every three letters and every one of their six possible orders, there exists at least one permutation in which the letters appear in this order.
A bonus question: What is special about this set of letters?
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01/02/2013 @ 01:00 PM EST
Solution: 02/01/2013 @ 01:00 PM EST
List Updated: 01/02/2013 @ 01:00 PM EST
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*Mark Mammel (01/02/2013 05:22 PM EDT)
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