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: boats 
Words: deck, gunwale, queen, lifeline, bridge
Example Output: queen

Example Input: Category: social gathering 
Words: group, dance hall, clan, club, dagwood
Example Output: dagwood

Example Input: Category: moral characteristic 
Words: tone, just, equitable, fair, unprejudiced
Example Output:
tone