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:
trustworthy, milky, fair, equitable, decent

Ex Output:
milky


Ex Input:
fret, crying, jack, fingerpick, string

Ex Output:

crying