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:
fire, blaze, water, flame, recruit

Ex Output:
recruit


Ex Input:
fair, well, milky, medium, loyal

Ex Output:
loyal


Ex Input:
answer calls, image, organize, file, correspondence

Ex Output:

image