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: concerned, fret, notes, frustrated, worried
Example Output: notes

Example Input: general, boring, soldier, ubiquitous, average
Example Output: soldier

Example Input: whale, stingray, shark, hunt, fish
Example Output:
hunt