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: guitar part
Words: fret, notes, emotional upsets, output cord, truss rod
Example Output: emotional upsets

Example Input: Category: aesthetic characteristic
Words: fair, unprejudiced, level, tone, milky
Example Output: unprejudiced

Example Input: Category: construction
Words: parrot, concrete pourer, crane, upraise, hoist
Example Output:
parrot