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: variety, medium, endure, size, fair
Example Output: endure

Example Input: knockout, blocking, crew, tko, deck
Example Output: crew

Example Input: carbs, chunky, fat, obese, skinny
Example Output:
carbs