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

Example Input: Category: activity 
Words: dally, seperate, fritter, waste, fried
Example Output: fried

Example Input: Category: aesthetic characteristic 
Words: there, fine, neat, calm, detailed
Example Output:
calm