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: meeting, community, lettuce, club, cinema
Example Output: lettuce

Example Input: replace, fire, retire, air, remove
Example Output: air

Example Input: descending, disgusted, emotionalities, emotional supports, down
Example Output:
descending