     0\cosh\left(\pmb{h}(K_t)+\pmb{h}(K_u)\right)     \prod_{\substack{\alpha=0 \\ \alpha\not=t,u}}^{k(\omega,G)}     0\cosh\big(\pmb{h}(K_\alpha)\big),     \end{gathered}$$ where $K_t\equiv K_t(\omega)$ and $K_u\equiv K_u(\omega)$ are two disjoint connected components containing the vertices $x$ and $y$, respectively.  