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:
cupcake, fudge, tart, smear, cream

Ex Output:
smear


Ex Input:
comfortable, ok, decent, fine, suspension

Ex Output:
suspension


Ex Input:
dastards, flow, current, blue, signal

Ex Output:

dastards