Two point-like objects of masses 20 gm and 30 gm are fixed at the two ends of a rigid massless rod of length 10 cm. This system is suspended vertically from a rigid ceiling using a thin wire attached to its center of mass, as shown in the figure. The resulting torsional pendulum undergoes small oscillations. The torsional constant of the wire is $$1.2 \times 10^{-8}$$ N m rad$$^{-1}$$. The angular frequency of the oscillations in $$n \times 10^{-3}$$ rad s$$^{-1}$$. The value of $$n$$ is ______.