combine attributes in document template

Hi,

I'm creating a pdf with document template and want to show Street and number , these are 2 seperate attributes (cause we are using a automatic postcode fill in app)

Because street length is not always same length it's hard to show street and number next to each other in correct way. so you get HOOOFDSTRAAT          14 . How can we get this in a correct view HOOFDSTRAAT 13  independent of lenght of streetname.

customstring doesn't work in document.

Regards,Michel.