#include <iostream>
#include <list>

using namespace std;

template<typename T>
struct Command
{
    virtual T Execute() = 0;
};

struct GetNamesCommand : public Command<list<string> >
{
    list<string> Execute()
    {
        list<string> a;
        a.push_back( "one" );
        a.push_back( "two" );
        a.push_back( "three" );
        return a;
    }
};

template<typename T>
T ExecuteCommand( Command<T>& command )
{
    return command.Execute();
}

int main( void )
{
    GetNamesCommand gnc;
    list<string> names = ExecuteCommand( gnc );
    for( list<string>::iterator i = names.begin(); i != names.end(); ++i )
    {
        cout << i->c_str() << endl;
    }
}