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: fair, mild, loyal, alright, trustworthy
Example Output: mild

Example Input: trustworthy, milky, fair, equitable, decent
Example Output: milky

Example Input: loyal, light, even, ghostly, fair
Example Output:
loyal