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:
vitamin c, salt, fat, big, absorption

Ex Output:
absorption


Ex Input:
goodies, wienerwurst, frank, hot dog, brash

Ex Output:
brash


Ex Input:
cards, tko, suits, deck, check

Ex Output:

tko