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:
ice, let go, fire, sack, replace

Ex Output:
ice


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

Ex Output:
suspension


Ex Input:
mad, neat, fine, ok, alright

Ex Output:

neat