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: balanced, well, milky, size, fair
Example Output: balanced

Example Input: blow, squander, apple, fritter, divide
Example Output: apple

Example Input: board, joker, deck, fold, apron
Example Output:
apron