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: provision, frank, hot dog, goodies, harsh
Example Output: harsh

Example Input: truss rod, pick, chord, worried, fret
Example Output: worried

Example Input: unjust, fair, balanced, brisk, dishonest
Example Output:
brisk