def rld.c0b
import bend-kit-collections@0.1.4.1/nat_order.bend as NatOrderimport Base
447def rld.c0b(+l: Nat, +x: Nat, +y: Nat, +b: Nat, h1: LE(Nat.add(x, y), Nat.mul(3n, b)), h3: LE(1n+Nat.mul(3n, l), Nat.add(Nat.add(x, y), b)), h5: LE(x, Nat.mul(3n, y))) -> LE(Nat.add(l, x), Nat.mul(3n, Nat.add(y, b))):
448 by_contra(Nat.add(l, x), Nat.mul(3n, Nat.add(y, b)), ng => rld.c0b.k(l, x, y, b, ng, h1, h3, h5))