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.

Q: luke, make the grade, fair, milky, deal

A: milky
****
Q: pick, fret, string, fingerpick, sad

A: sad
****
Q: precise, integrity, frank, cheese, brash

A:
cheese
****