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:
spring, run, fall, equinox, autumn

Ex Output:
run


Ex Input:
unyielding, firm, llc, alignment, private

Ex Output:
unyielding


Ex Input:
well, fair, dishonest, balanced, unprejudiced

Ex Output:

well