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: hardware, firewall, file, format, order office supplies
Example Output: order office supplies

Example Input: trustworthy, well, fair, loyal, stormy
Example Output: stormy

Example Input: light, cold, windy, luke, fair
Example Output:
light