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: blow, waste away, fritter, dally, croquet
Example Output: croquet

Example Input: lead, glass, spoon, fiberglass, spyhole
Example Output: spoon

Example Input: commander, colonel, major, general, plain
Example Output:
plain