Given a set of five words, generate the word from the set that does not belong (i.e. is the least relevant) with the other words. Words are separated by commas.

Example Input: merchandise, specialty, tools, content, angry
Example Output: angry

Example Input: bats, pounce, cockroach, bike, fly
Example Output: bike

Example Input: shop, content, food, sad, clothing
Example Output:
sad