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:
fret, angry, jack, nervous, emotionalities

Ex Output:
jack


Ex Input:
annoyed, fine, exquisite, alert, ok

Ex Output:
exquisite


Ex Input:
meat, courage, frank, loyalty, stern

Ex Output:

meat