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: knockout, blocking, crew, tko, deck
Example Output: crew

Example Input: provision, frank, hot dog, goodies, harsh
Example Output: harsh

Example Input: fax, schedule appointments, hardware, file, answer
Example Output:
hardware