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: horse, trap, tiger, sea turtle, fish
Example Output: trap

Example Input: group, blt, french toast, hamburger, club
Example Output: group

Example Input: thing, fearful, jealous, content, disappointed
Example Output:
thing