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:
concerned, fret, notes, frustrated, worried

Ex Output:
notes


Ex Input:
well, honorable, sunny, fair, dishonest

Ex Output:
sunny


Ex Input:
raining, fair, variety, deal, cold

Ex Output:

variety