  It is shown how to use as horizontal symmetry the dicyclic group $Q_6 \subset
SU(2)$ in a supersymmetric unification $SU(5)\otimes SU(5)\otimes SU(2)$ where
one $SU(5)$ acts on the first and second families, in a horizontal doublet, and
the other acts on the third. This can lead to acceptable quark masses and
mixings, with an economic choice of matter supermultiplets, and charged lepton
masses can be accommodated.
