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.

Input: Consider Input: confident, popular, classy, cool, chill

Output: chill


Input: Consider Input: squashed, cabin, flat, smooth, round

Output: smooth


Input: Consider Input: cold, fair, light, sunny, mild


Output: light