  We present the results of a numerical search for the Dirac Yukawa matrices of
the Standard Model, consistent with the quark and lepton masses and their
mixing angles. We assume a diagonal up-quark matrix, natural in $\bs{\m Z_7
\rtimes \m Z_3}$, Bimaximal or Tri-bimaximal seesaw mixing, and $SU(5)$
unification to relate the down-quark and charged lepton Dirac Yukawa matrices
using Georgi-Jarlskog mechanisms. The measured value of $\theta_{13}$ requires
an asymmetric down-quark Yukawa matrix. Satisfying the measured values of both
$\theta_{13}$ and the electron mass restricts the number of solutions,
underlying the importance of the recent measurement of the reactor angle.
