hopefully you will be able to travel, but in view of your very short time, i cannot see you having much of a chance to visit two countries in that time. better to stick to one place.
where are you flying in to? where are you flying out from? how are you travelling? all the travel will eat into your visit.
as to what to see? what do you WANT to see, or is this a visit to say you have "bin there...dun that " ?
i would suggest that you get a guide book for each country and you will see the wide diversity of sights in both countries
In order to learn what can be seen and done in a certain country, you need to do some basic research by yourself.
As mentioned, the timeframe stated, good for two countries, in which there is a lot to do and see, is very poor.