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.

Ex Input:
fair, raining, equitable, impartial, unjust

Ex Output:
raining


Ex Input:
data sets, sea, prompt, timely, current

Ex Output:
sea


Ex Input:
kayak, mice, fish, climbing, swim

Ex Output:

mice