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: chocolate food 
Words: fudge, tart, chocolate cake, falsehood, cupcake
Example Output: falsehood

Example Input: Category: bird 
Words: flamingo, crane, neck, ostrich, davit
Example Output: davit

Example Input: Category: police punishment 
Words: hearing, jail time, prison, dull, fine
Example Output:
dull