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: outdoor sport activity 
Words: hunting, goat, wrestle, fish, raft
Example Output: goat

Example Input: Category: military rank 
Words: regular, major, general, soldier, cadet
Example Output: regular

Example Input: Category: physical property 
Words: thin, fat, obese, skinny, sugars
Example Output:
sugars