}\\ &\leq (0+\epsilon) 0^{n(R_0+R_0)} \sum_{(y^n, z^n)\in \mathcal{T}_{\epsilon}^{(n)}} P\{Y^n=y^n, Z^n=z^n|\mathcal{M}\} \notag \\ &\hspace{0cm} \sum_{u_0\in \mathcal{T}_{\epsilon}^{(n)}(U_0|y^n, z^n)}    