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: fly, swim, car, beetle, grasshopper
Example Output: car

Example Input: comfortable, money, fine, prison, jail time
Example Output: comfortable

Example Input: unyielding, firm, leverage, streamline, ceo
Example Output:
unyielding