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: hunt, fish, stingray, dolphin, bat
Example Output: hunt

Example Input: ugly, absorption, vitamin c, fat, thin
Example Output: vitamin c

Example Input: ring, deck, joker, corner, tko
Example Output:
joker