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: loveful, up, down, remorseful, melancholy
Example Output: up

Example Input: delayed, brine, belated, current, postponed
Example Output: brine

Example Input: firewall, software, schedule appointments, text, file
Example Output:
schedule appointments