Among $\left[\mathrm{Ni}(\mathrm{Co})_4\right],\left[\mathrm{NiCl}_4\right]^{2-},\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}_2\right] \mathrm{Cl}, \mathrm{Na}_2\left[\mathrm{CoF}_6\right]^{3+}, \mathrm{Na}_2 \mathrm{O}_2$ and $\mathrm{CsO}_2$, the total number of paramagnetic compounds is