What'e the best way around this?

I have 6 string components that will either have strings or integers or will be empty. If the input is null I'd like to output the string "None." If the input is not null I would like to send it through unchanged. In both cases I want to put the result on it's own branch. I will always have 6 branches.

I would like to take care of this all at once (as opposed to breaking it apart into 6 separate operations). I've tried several things but have had no luck.

Thanks

-Brian