interface IAdministrator { 
    void reset(); 
    // throws out all players, picks new pair of barter cards
    // and a new deck of cards

    void registerPlayer(String name, IPlayer p); 
    // make and register a player (with given name for a game)

    String playGame(int n); 
    // play n rounds of the game, then produce an announcement about winners

    // sequence contract: registerPlayer+ x playGame
}