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:
descending, disgusted, emotionalities, emotional supports, down

Ex Output:
descending


Ex Input:
fire, blaze, water, flame, recruit

Ex Output:
recruit


Ex Input:
tumble, summer, fall, bend, lift

Ex Output:

summer