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: down, lower, opposite of up, ground, remorseful

Output: remorseful

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

Output: lettuce

Input: Consider Input: open-faced, community, club, doorstep, toast
Output: community