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: aesthetic characteristic 
Words: loyal, medium, ghostly, tone, fair
Example Output: loyal

Example Input: Category: date status 
Words: dastards, whirlpool, detests, current, prompt
Example Output:
whirlpool