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, kind, ashamed, sliding, unhappy
Example Output: sliding

Example Input: fudge, molasses, cream, tart, banned
Example Output: banned

Example Input: bus, fly, ant, drive, glide
Example Output:
ant