Find the equation of the plane which bisects the angle between the planes $3x - 6y + 2z + 5 = 0$ and $4x - 12y + 3z - 3 = 0,$ and which contains the point $(-5,-1,-5).$  Enter your answer in the form
\[Ax + By + Cz + D = 0,\]where $A,$ $B,$ $C,$ $D$ are integers such that $A > 0$ and $\gcd(|A|,|B|,|C|,|D|) = 1.$
Suppose $P = (x,y,z)$ is a point that lies on a plane that bisects the angle between the planes $3x - 6y + 2z + 5 = 0$ and $4x - 12y + 3z - 3 = 0.$  (Note that there are two such bisecting planes.)  Then the distance from $P$ to both planes must be equal, so
\[\frac{|3x - 6y + 2z + 5|}{\sqrt{3^2 + (-6)^2 + 2^2}} = \frac{|4x - 12y + 3z - 3|}{\sqrt{4^2 + (-12)^2 + 3^2}}.\]Then
\[\frac{|3x - 6y + 2z + 5|}{7} = \frac{|4x - 12y + 3z - 3|}{13}.\]We want to remove the absolute value signs, in order to obtain the equation of a plane.  Checking the sign of both sides when $(x,y,z) = (-5,-1,-5)$ leads us to
\[\frac{3x - 6y + 2z + 5}{7} = \frac{4x - 12y + 3z - 3}{13}.\]This simplifies to $\boxed{11x + 6y + 5z + 86 = 0}.$