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
People who answered correctly:
*Mark Mammel (01/02/2013 05:22 PM EDT)
Deane Stewart (01/02/2013 07:01 PM EDT)
*Tobias Philipp (01/03/2013 04:21 PM EDT)
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Jason Lee, Brandon Leonhardt & Jacob Woolcutt (01/03/2013 11:53 PM EDT)
*Johannes Waldmann (01/04/2013 09:15 AM EDT)
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Peter Gerritson (01/09/2013 04:40 PM EDT)
Liubing Yu (01/10/2013 01:15 AM EDT)
Jamie Jorgensen (01/10/2013 04:55 AM EDT)
*Martin Husar (01/11/2013 10:00 AM EDT)
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Todd Will (01/17/2013 12:48 PM EDT)
Florian Fischer (01/18/2013 06:20 PM EDT)
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*Christian Pape (01/21/2013 07:35 PM EDT)
*Stéphane Higueret (01/22/2013 05:17 AM EDT)
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*Nyles Heise (01/25/2013 09:27 AM EDT)
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