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:
fair, endure, mild, color, tangle

Ex Output:
color


Ex Input:
sausage, matter of fact, frank, vittles, grub

Ex Output:
matter of fact


Ex Input:
detestings, data sets, prompt, course, current

Ex Output:

course