Among $\left[\mathrm{Co}(\mathrm{CN})_4\right]^4,\left[\mathrm{Co}(\mathrm{CO})_3\left(\mathrm{NO}_2\right)\right], \mathrm{XeF}_4,\left[\mathrm{PCl}_4\right]^{+},\left[\mathrm{PdCl}_4\right]^{2-},\left[\mathrm{Cl}_4\right]^{-},\left[\mathrm{Cu}(\mathrm{CN})_4\right]^{3-}$ and $\mathrm{P}_4$ the total number of species with tetrahedral geometry is $\_\_\_\_$ .