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: gunwale, deck, punch, sail, bow
Example Output: punch

Example Input: kind, down, sad, backward, emotionalities
Example Output: backward

Example Input: absorption, area, fat, carbs, chunky
Example Output:
carbs