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: finger, heel, foot, ounce, elbow
Example Output: ounce

Example Input: universal, standard, commander, general, typical
Example Output:
commander