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: dump truck, tackle, crane, duck, mallet
Example Output: dump truck

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

Example Input: burger, team, place, club, discothek
Example Output:
burger