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: unflappalbe, refreshing, funny, cool, confident

Output: refreshing


Input: Consider Input: windlass, hummingbird, neck, crane, duck

Output: windlass


Input: Consider Input: heron, digger, hoist, crane, parrot


Output: digger