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: corner, ring, crew, deck, apron
Example Output: crew

Example Input: output cord, fret, notes, frustrated, chord
Example Output: frustrated

Example Input: level, fair, milky, tangle, cool
Example Output:
tangle