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:
condominium, smooshed, lined, smooth, flat

Ex Output:
condominium

Ex Input:
falling, down, emotionalities, right, downward

Ex Output:
emotionalities