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: sea turtle, whale, dog, fish, hunting
Example Output: hunting

Example Input: size, unjust, tone, fair, medium
Example Output: unjust

Example Input: pie, dally, cake, fritter, patty
Example Output:
dally