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: disgusted, up, below, downward, down
Example Output: disgusted

Example Input: duck, cat, stoop, swan, goose
Example Output: stoop

Example Input: run, jump, autumn, fall, swim
Example Output:
autumn