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:
leverage, solid, firm, amalgamated, concerted

Ex Output:
solid


Ex Input:
windlass, hummingbird, neck, crane, duck

Ex Output:
windlass


Ex Input:
pale, milky, ghostly, decent, fair

Ex Output:

decent