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.

Example Input: nervous, frustrated, fret, jack, concerned
Example Output: jack

Example Input: fret, angry, jack, nervous, emotionalities
Example Output: jack

Example Input: fritter, apple, divide, croquet, pie
Example Output:
divide