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:
invent, unlicensed, brownies, lie, fudge

Ex Output:
brownies


Ex Input:
concerned, fret, notes, frustrated, worried

Ex Output:
notes


Ex Input:
cool, sunny, fair, 70, brisk

Ex Output:

cool