∀ (x : Turing.PartrecToTM2.Cont'),
  Turing.PartrecToTM2.trNormal Turing.ToPartrec.Code.tail x =
    Turing.PartrecToTM2.Λ'.clear Turing.PartrecToTM2.natEnd Turing.PartrecToTM2.K'.main (Turing.PartrecToTM2.Λ'.ret x)