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: type of sandwich 
Words: meeting, bacon, submarine, toast, club
Example Output: meeting

Example Input: Category: boats 
Words: chips, crew, bow, deck, bridge
Example Output: chips

Example Input: Category: geographical property 
Words: smooshed, flat, lined, valley, duplex
Example Output:
duplex