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: computers 
Words: download, file, order office supplies, document, motherboard
Example Output: order office supplies

Example Input: Category: shady activities 
Words: falsification, fib, invent, fudge, cupcake
Example Output: cupcake

Example Input: Category: baby animals 
Words: buck, fawn, bambi, doe, lust
Example Output:
lust