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: belated, moon, current, data sets, do tests
Example Output: moon

Example Input: fret, worried, chord, notes, headstock
Example Output: worried

Example Input: balanced, fair, trustworthy, loyal, luke
Example Output:
luke