#include <iostream>


using namespace std;

namespace first
{
  int a;
  int b;
}

namespace second
{
  int a;
  int c;
}

using namespace first;

main()
{
  second::a = 11;
  a = 10;
  cout << "Hello " << a << "\n";
  cout << "Hello " << second::a << "\n";
}