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: activity 
Words: spend, divide, apple, whittle, fritter
Example Output: apple

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

Example Input: Category: poker 
Words: queen, deck, level, draw, joker
Example Output:
level