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: inlays, concerned, string, notes, fret

A: concerned
****
Q: sausage, matter of fact, frank, vittles, grub

A: matter of fact
****
Q: knife, panel, glass, acrylic, coating

A:
knife
****