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:
hull, galley, deck, lifeline, tko

Ex Output:
tko

Ex Input:
miserable, emotional supports, down, kind, south

Ex Output:
south

Ex Input:
danish, fritter, croquet, fried, lollygag

Ex Output:
lollygag