∀ {q : Turing.PartrecToTM2.Λ'} {s : Option Turing.PartrecToTM2.Γ'} {n : ℕ} {c d : List Turing.PartrecToTM2.Γ'},
  StateTransition.Reaches₁ (Turing.TM2.step Turing.PartrecToTM2.tr)
    { l := some q.succ, var := s, stk := Turing.PartrecToTM2.K'.elim (Turing.PartrecToTM2.trList [n]) [] c d }
    { l := some q, var := none, stk := Turing.PartrecToTM2.K'.elim (Turing.PartrecToTM2.trList [n.succ]) [] c d }