public void execute(RequestModel requestModel) {
   Scenario scenario;
   if (requestModel.requestedScenarioIs(Scenarios.REST)) {
     scenario = new Rest(game, output);
   } else if (requestModel.requestedScenarioIs(Scenarios.MOVE)) {
     scenario = new MovePlayer(game, output, requestModel.getDirection());
   } else if (requestModel.requestedScenarioIs(Scenarios.SHOOT)) {
     scenario = new ShootArrow(game, output, requestModel.getDirection());
   } else {
     scenario = new UnknownCommand(game, output, requestModel.getUnknownCommand());
   }
   scenario.invoke();
 }