#include <iostream>

// anonymous namespace
// objects in this namepsace can be accessed only in this translation unit
namespace 
{
  int x;
}

namespace www_0x4849_dot_net
{
  int y;
}

// this is a namespace alias
// the alias can be used in place of the original name
namespace hi = www_0x4849_dot_net;

int main() 
{ 
  x = 3;

  hi::y = 2;

  www_0x4849_dot_net::y +=2;

  std::cout << x + hi::y << std::endl;

  return 0;
}