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:
organize, support, text, sort mail, file

Ex Output:
text


Ex Input:
frank, stern, hot dog, loyalty, matter of fact

Ex Output:

hot dog