  We apply the permutation symmetry S_3 to both charged-lepton and neutrino
mass matrices, and suggest a useful symmetry-breaking scheme, in which the
flavor symmetry is explicitly broken down via S_3 -> Z_3 -> nothing in the
charged-lepton sector and via S_3 -> Z_2 -> nothing in the neutrino sector.
Such a two-stage breaking scenario is reasonable in the sense that both Z_3 and
Z_2 are the subgroups of S_3, while Z_3 and Z_2 only have a trivial subgroup.
In this scenario, we can obtain a relatively large value of the smallest
neutrino mixing angle, e.g., theta_{13} ~ 9^\circ, which is compatible with the
recent result from T2K experiment and will be precisely measured in the ongoing
Double Chooz and Daya Bay reactor neutrino experiments. Moreover, the maximal
atmospheric mixing angle theta_{23} ~ 45^\circ can also be obtained while the
best-fit value of solar mixing angle theta_{12} ~ 34^\circ is assumed, which
cannot be achieved in previous S_3 symmetry models.
