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: duck, cat, stoop, swan, goose
Example Output: stoop

Example Input: gunwale, stern, deck, box, bow
Example Output: box

Example Input: fiberglass, translucent fabric, glass, knive, spyhole
Example Output:
knive