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:
relaxed, warm, assured, level, cool

Ex Output:
warm


Ex Input:
fly, swim, car, beetle, grasshopper

Ex Output:
car


Ex Input:
chocolate cake, cookies, fudge, cream, fix

Ex Output:

fix