  \boar \squirrel \panda \newt\dog \sheep\llama \hat{P}_{r}^{2}\Psi =\hbar ^{2}k^{2}\Psi ,\;\,\hat{P}_{r}^{2}=\hat{P}%_{1}^{2}+\hat{P}_{2}^{2}\,,\;k_{0}^{2}=m^{2}+k_{3}^{2}+k^{2},\;m=\frac{m_{0}c%}{\hbar }\,.  \label{14}