$\mathcal{M}: \mathcal{A} = \{a, b\}$ \\$P^\mathcal{M} = \{(a,a), (a,b)\}$
$\mathcal{M}: \mathcal{A} = \{a, b\}$ \\
$P^\mathcal{M} = \{(a,a), (a,b)\}$