  We investigate the full counting statistics of a voltage-driven normal
metal(N)-superconductor(S) contact. In the low-bias regime below the
superconducting gap, the NS contact can be mapped onto a purely normal contact,
albeit with doubled voltage and counting fields. Hence in this regime the
transport characteristics can be obtained by the corresponding substitution of
the normal metal results. The elementary processes are single Andreev transfers
and electron- and hole-like Andreev transfers. Considering Lorentzian voltage
pulses we find an optimal quantization for half-integer Levitons.
