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: body part 
Words: foot, knee, eye, leg, ounce
Example Output: ounce

Example Input: Category: emotional display 
Words: follow, doe, suppressed, culture, fawn
Example Output: doe

Example Input: Category: emotional status 
Words: mad, beautiful, comfortable, fine, relaxed
Example Output:
beautiful