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: ok, neat, fine, attractive, beautiful
Example Output: ok

Example Input: ashamed, down, emotional upsets, disgusted, ground
Example Output: ground

Example Input: arrest, alright, jail, penalty, fine
Example Output:
alright