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: apartment, round, valley, flat, even

Output: valley


Input: Consider Input: meeting, community, lettuce, club, cinema

Output: lettuce


Input: Consider Input: panicked, thing, service, content, specialty


Output: panicked