How to ban all connections to .se and .ru in the hosts.deny file

I am trying to figure out, whether or not it's possible to make sure, that if a user uses a browser and types in a domain name that ends on either "se" or "ru", they will be denied access to that site. PS: this is a school assignment, and my teacher demands that I make use of tcp wrapper, so downloading some module that will do the trick is out of the question, unfortunately