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: down, lower, opposite of up, ground, remorseful
Example Output: remorseful

Example Input: spring, run, fall, equinox, autumn
Example Output: run

Example Input: tangle, fair, impartial, dishonest, balanced
Example Output:
tangle