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:
jack, string, crying, neck, fret

Ex Output:
crying


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

Ex Output:
order office supplies


Ex Input:
stern, pork, wiener, frank, vittles

Ex Output:

stern