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: poker 
Words: blind, chips, queen, gunwale, deck
Example Output: gunwale

Example Input: Category: measurement unit 
Words: ounce, ear, inch, foot, milimeter
Example Output: ear

Example Input: Category: animal 
Words: hamster, mice, fish, tiger, row
Example Output:
row