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: file, keys, organize, errands, correspondence
Example Output: keys

Example Input: fret, nervous, board, fingerpick, jack
Example Output: nervous

Example Input: annoyed, well, calm, high quality, fine
Example Output:
high quality