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:
inlays, concerned, string, notes, fret

Ex Output:
concerned


Ex Input:
deck, crew, fight, knockout, tko

Ex Output:
crew


Ex Input:
raining, sunny, fair, trustworthy, cold

Ex Output:

trustworthy