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: dull, fine, handsome, detailed, jail time
Example Output: jail time

Example Input: fly, flutter, bus, drive, fish
Example Output: fish

Example Input: happy, fine, alert, dull, content
Example Output:
dull