HMMT November 2013 U31

Chords $\overline{A B}$ and $\overline{C D}$ of circle $\omega$ intersect at $E$ such that $A E=8, B E=2, C D=10$, and $\angle A E C=90^{\circ}$. Let $R$ be a rectangle inside $\omega$ with sides parallel to $\overline{A B}$ and $\overline{C D}$, such that no point in the interior of $R$ lies on $\overline{A B}, \overline{C D}$, or the boundary of $\omega$. What is the maximum possible area of $R$ ?