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:
unlicensed, chocolate, heavy, fudge, chocolate cake

Ex Output:
unlicensed


Ex Input:
trap, kayak, bat, climbing, fish

Ex Output:
bat


Ex Input:
color, dishonest, unprejudiced, fair, unjust

Ex Output:

color