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

Example Input: fearful, food, content, nervous, excited
Example Output: food

Example Input: flaxen, fair, balanced, pale, color
Example Output:
balanced