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.
--------
Question: blow, waste away, fritter, dally, croquet

Answer: croquet


Question: hull, galley, deck, lifeline, tko

Answer: tko


Question: file, fax, prepare, answer calls, document

Answer:
document