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:
crane, winch, mallet, winch, flamingo

Ex Output:
winch


Ex Input:
finger, heel, foot, ounce, elbow

Ex Output:
ounce


Ex Input:
courage, entree, precise, blunt, frank

Ex Output:

entree