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I have a set with 26 special domino stones. Every stone carries a lower case Latin alphabet letter and an upper case Latin alphabet letter:

  a b c d e f g h i j k l m n o p q r s t u v w x y z
  F M C Z P A Q T S K J U B Y O E G W I H L X R V N D

I know an English word of ten (not necessarily distinct) letters that I can spell with these stones on the table. If I arrange ten domino stones from left to right so that their lower case letters spell my word, then the upper case letters also spell my word but backwards. What is this word?

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  • $\begingroup$ Well, just tried brute forcing with every commonly available word. Assuming all letters have to be distinct, you're using an extremely obscure English word. $\endgroup$ – SGR Apr 1 '16 at 8:48
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The word is

PILOTHOUSE

Found by searching a list of ten letter words on this site.

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  • 2
    $\begingroup$ I thought that the letters had to be different, as in non-repeating EDIT: Apparently distinct does not mean distinct anymore. $\endgroup$ – SGR Apr 1 '16 at 8:52
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    $\begingroup$ Also disappointed by the "distinct" letters not actually being distinct. But the comment about palindromes is not correct; if, for instance, the word starts with a P, it must end with an E. $\endgroup$ – ffao Apr 1 '16 at 8:56
  • $\begingroup$ You're right! Fixed. $\endgroup$ – Aurey Apr 1 '16 at 8:58
  • $\begingroup$ I am disapointed, I was looking for a word without o and c because of the disctint hint :( $\endgroup$ – Fabich Apr 1 '16 at 9:05
  • $\begingroup$ @SGR Not really, e.g. you could make the word numbly, which has only distinct letters. The fact is just that no 10-letter example exists. $\endgroup$ – ffao Apr 1 '16 at 9:48

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