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.

Example Input: Category: moral characteristic 
Words: unprejudiced, warm, fair, ok, balanced
Example Output: warm

Example Input: Category: secretary duty 
Words: errands, fax, file, type, ram
Example Output: ram

Example Input: Category: emotional status 
Words: crying, truss rod, angry, emotional supports, fret
Example Output:
truss rod