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:
ghostly, fair, medium, cold, well

Ex Output:
cold


Ex Input:
lower, backward, down, falling, shameful

Ex Output:
shameful


Ex Input:
impartial, clime, fair, ok, loyal

Ex Output:

clime