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:
unyielding, concerted, firm, combined, united

Ex Output:
unyielding


Ex Input:
dagwood, club, doorstep, hamburger, community

Ex Output:
community


Ex Input:
milky, 70, color, fair, tone

Ex Output:

70