def aria_d2
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
6472def aria_d2(+s: A.LcAriaSt) -> {s == A.aria.u2(A.aria.d2(s)) : A.LcAriaSt}:
6473 %aria_e1(A.aria.d1(s)) : {s == A.aria.u1(_) : A.LcAriaSt}
6474 aria_d1(s)