Let $\alpha$, $\beta$ and $\gamma$ be real numbers such that the system of linear equations x + 2y + 3z =$\alpha$ 4x + 5y + 6z =$\beta$ 7x + 8y + 9z =$\gamma -$ 1 is consistent. Let | M | represent the determinant of the matrix $$M = \left[ {\begin{matrix} \alpha & 2 & \gamma \\ \beta & 1 & 0 \\ { - 1} & 0 & 1 \\ \end{matrix} } \right]$$ Let P be the plane containing all those ($\alpha$, $\beta$, $\gamma$) for which the above system of linear equations is consistent, and D be the square of the distance of the point (0, 1, 0) from the plane P. The value of D is $\underline{\hspace{2cm}}$.