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:
dog, push, duck, squat, jog

Ex Output:
dog


Ex Input:
early, water, delayed, history, current

Ex Output:
water


Ex Input:
molasses, rich, pudding, fudge, unlicensed

Ex Output:

unlicensed