#include <iostream>
#include <string>

using namespace std;

namespace user1
{
          string user_name = "WZR";
}

namespace user2
{
          string user_name = "GWZ";
}
          
int main()
{
    cout << "\n" << "Hello " << user1::user_name;
    cout << "\n" << "Hello " << user2::user_name;
    return 0;
}