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:
hardware, firewall, file, format, order office supplies

Ex Output:
order office supplies


Ex Input:
mild, cold, level, stormy, fair

Ex Output:
level


Ex Input:
fair, well, balanced, unprejudiced, windy

Ex Output:

windy