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:
banned, fudge, invent, cupcake, loosen

Ex Output:
cupcake


Ex Input:
danish, fried, lollygag, pastry, fritter

Ex Output:
lollygag


Ex Input:
blaze, retire, fire, heat, cool

Ex Output:

retire