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:
pick, fret, string, fingerpick, sad

Ex Output:
sad


Ex Input:
firm, tough, solid, hard, streamline

Ex Output:
streamline


Ex Input:
handle, translucent fabric, spatula, spyhole, glass

Ex Output:

spatula