Untitled

Untitled
In a stem A: {5 7 8 9 A B 0 1 2 3 4 6}, it is interrupted by B: {9 4 7 0 6 A 2 8 1 3 5 B}, what becomes of A'.
Did you say that only the characters count?
Composer: Fèlix Pastor Olives
Artwork: Untitled, Emili Godes, circa 1930