∀ {Γ : Type u_1} {n : ℕ} {enc : Γ → List.Vector Bool n} [inst : Inhabited Γ]
  (enc0 : enc default = List.Vector.replicate n false) (L R : Turing.ListBlank Γ),
  Turing.TM1to1.trTape' enc0 L R =
    Turing.Tape.mk' (L.flatMap (fun x => (enc x).toList.reverse) ⋯) (R.flatMap (fun x => (enc x).toList) ⋯)