The equation of a circle is (x + 12)^{2} + (y + 16)^{2} = (r_{1})^{2}, and the circle passes through the origin. The equation of the circle then changes to (x – 30)^{2} + (y – 16)^{2} = (r_{2})^{2}, and the circle still passes through the origin. What are the values of r_{1} and r_{2}?