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:
glass, wood, coating, knifer, woodwork

Ex Output:
knifer


Ex Input:
glove, ring, deck, box, bow

Ex Output:
bow


Ex Input:
streamline, solid, firm, shareholders, corporation

Ex Output:

solid