c.person.surname = "surname-" + nmb;
c.person.firstname = "firstname-" + nmb;
c.person.gender = (nmb % 2 == 0)? "m" : "f";
c.person.phonenumber = "1000" + nmb;
Address address = new Address();
address.type = "billing";
address.street = "street-" + nmb;
address.housenumber = Integer.toString(nmb);
address.zipcode = "12345";
address.city = "City " + nmb;
c.addresses.add(address);
address = new Address();
address.type = "delivery";
address.street = "street-del-" + nmb;
address.housenumber = Integer.toString(nmb);
address.zipcode = "54321";
address.city = "City " + nmb;