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: confident, popular, classy, cool, chill
Example Output: chill

Example Input: concerned, bored, emotional, fret, output cord
Example Output: output cord

Example Input: wiener, entree, frank, meat, brash
Example Output:
brash