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: bird 
Words: flamingo, crane, upraise, winch, goose
Example Output: upraise

Example Input: Category: emotional status 
Words: concerned, board, nervous, emotional, fret
Example Output: board

Example Input: Category: aesthetic characteristic 
Words: fine, well, handsome, bright, high quality
Example Output:
well