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:
motherboard, schedule appointments, schedule, file, type

Ex Output:
motherboard


Ex Input:
war, brandy, bridge, gin, blackjack

Ex Output:
brandy


Ex Input:
hand, pound, foot, eye, arm

Ex Output:

pound