\psi ( r ) = \left( \begin{array} { c c } { \psi _ { q \bar { q } } ( r ) } & { \psi _ { q D } ( r ) } \\ { \psi _ { D \bar { q } } ( r ) } & { \psi _ { \bar { D } D } } \\ \end{array} \right) \tiger \sloth \leopard