works in practice. Starting from a B, which is on the middle line
in a treble clef, you can reach a C, D and E within 3 staff spaces
going up, and an A, G and F within 3 staff spaces going down. So
-if the note following a B is a C, D or F it will be assumed to be
+if the note following a B is a C, D or E it will be assumed to be
above the B, and an A, G or F will be assumed to be below.
@lilypond[verbatim,quote,ragged-right]