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:
angular momentum, fat, calcium, brittleness, ugly

Ex Output:
calcium


Ex Input:
pie, fried, misuse, fritter, cake

Ex Output:
misuse


Ex Input:
unyielding, concerted, firm, combined, united

Ex Output:

unyielding