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:
impartial, fair, honorable, level, fine

Ex Output:
level


Ex Input:
warm, optimist, hot, relaxing, cool

Ex Output:
optimist


Ex Input:
fire, praise, heat, sack, hire

Ex Output:

heat