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: goodies, sausage, frank, bold, entree
Example Output: bold

Example Input: unyielding, concerted, firm, combined, united
Example Output: unyielding

Example Input: buck, fawn, bambi, doe, lust
Example Output:
lust