#include <iostream>

namespace screen
{
     int lines = 5;
}  // end of screen namespace

namespace printer
{
          int lines = 10;
}  // end of printer namespace

int main()
{
  std::cout << "\nThe screen lines are: " 
            << screen::lines << std::endl; 
  std::cout <<"\nThe printer lines are: "
            << printer::lines;
  std::cout << std::endl;

  return 0;
}