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: ok, wispy, jail, prime, fine
Example Output: ok

Example Input: fair, mild, loyal, alright, trustworthy
Example Output: mild

Example Input: duck, sprint, mallet, sheep, goose
Example Output:
sprint