HowTo divide streetname from house-nr ?

  Hi,

how could I divide streetnames from housenumbers ?

I have to deal with input like this:

Parkstreet 42
Parkstr. 42
Casle Avenue 42
Casle Str. 42-47
Casle Str. 54 - 55

probaply even
Casle Str. 42-47 a

Perhaps one could cut ap the 1st numeric char and regard everything left 
of it as the street name and the rest as house number.
OK, this would fail with "42, Parkstreet" but those aren't to frequent.

How would I do this?