def aria_dd20
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
6620def aria_dd20(+s: A.LcAriaSt) -> {s == A.aria.d20(A.aria.u20(s)) : A.LcAriaSt}:
6621 %aria_dd19(A.aria.e19(s)) : {s == A.aria.e19(_) : A.LcAriaSt}
6622 aria_e19(s)