Is there was a way to code a request such that there is at least one stop in the route, but exclude airports in a particular country for the stop(s)? For example, I'd like to do a trip from the US to PVG, returning with a stop in a 3rd country to eliminate the need for a visa. I know I can code in specific cities like NRT, but I wondered if I could just let the system choose for me. Or am I making this too complicated?