Shaded Area in a Trapezoid with Equal Segments

In trapezoid $ABCD$ (with $AD \parallel BC$), points $E$ and $F$ lie on leg $AB$ with $AE = BF$. Segments $CE$ and $DF$ intersect at $O$, and segments $DE$ and $CF$ are also drawn. The area of trapezoid $ABCD$ is $25$ and the area of $\triangle OCD$ is $8$. Find the total area of the shaded region, consisting of $\triangle ODE$ and $\triangle OCF$.