( ( "C: viiø7" ) ( "B" "D" "F" "A" ) ( "Null" "1" "24g. HALF-DIMINISHED SEVENTH CHORDS, iiø7 AND viiø7" "Spell a diminished triad with the indicated second scale-step or leading-tone scale-step as the root. Add a major 3rd above the triad fifth." " " ) )