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:
hotel, level, flat, even, lined

Ex Output:
lined


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

Ex Output:
notes


Ex Input:
corner, call, pack, suits, deck

Ex Output:

corner