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: dangle, fly, bee, bats, bike
Example Output: bike

Example Input: level, tone, fair, impartial, milky
Example Output: impartial

Example Input: horizontal, even, flat, level, round
Example Output:
horizontal