Given a category and a set of five words, find the word from the set that does not belong (i.e. is the least relevant) with the other words in the category. Words are separated by commas.
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Question: Category: secretary duty 
Words: support, hardware, prepare, file, make coffee

Answer: hardware


Question: Category: guitar part 
Words: inlays, concerned, string, notes, fret

Answer: concerned


Question: Category: type of sandwich 
Words: toast, blt, club, hoagie, dance hall

Answer:
dance hall