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: sergeant, general, standard, plain, ordinary
Example Output: sergeant

Example Input: amalgamated, firm, unyielding, shareholders, ceo
Example Output: unyielding

Example Input: major, ordinary, general, popular, average
Example Output:
major