def aria_d20
import bend-osdev-aria@0.1.0.0/PROOF.bend as PROOFimport Base
import bend-osdev-aria@0.1.0.0/aria.bend as A
6616def aria_d20(+s: A.LcAriaSt) -> {s == A.aria.u20(A.aria.d20(s)) : A.LcAriaSt}:
6617 %aria_e19(A.aria.d19(s)) : {s == A.aria.u19(_) : A.LcAriaSt}
6618 aria_d19(s)