Unscramble letters using grep...

[got_nothing]

Hi there, I am trying to attempt some of the tutorial question for my school work and currently having some problem on doing an unscramble letters using grep.....

Here is the question:

"Using grep and /usr/share/dict/words to unscramble the words: ailnosuxy"

This is how I got for so far:

grep '^[ailnosuxy]\{9\}$' /usr/share/dict/words

The following command will going to display all the letters that in the "ailnosuxy" exactly in 9 characters in each line. However, some of the letters are repeated in the same line:

e.g:

unsinuous
unusually << "u", "l" repeated 2,3 times and etc..

Can anymore please point out or give out any hints on how to make the each of the letters only appear once in a line?

[Vergil83]

Sorry, no homework questions
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