abstract class Command {
	protected Robot robot;
	
	public void setRobot (Robot _robot){
		this.robot = _robot;
	}
	public abstract void execute();
}

class MoveForwardCommand extends Command{
	int space;
	
	public MoveForwardCommand (int _space){
		space = _space;
	}
	
	public void execute() {
		robot.moveForward(space);
	}
}

class TurnCommand extends Command{
	Robot.Direction derection;
	
	public TurnCommand (Robot.Direction _direction){
		direction = _direction;
	}
	
	public void execute() {
		robot.turn(direction);
	}
}

class PickupCommand extends Command{	
	public void execute() {
		robot.pickup();
	}
}

public class Robot{
	public enum Direction {LEFT, RIGHT}

	public void moveForward(int space){
		System.out.println(space + "칸 전진");
	}

	public void turn(Direction _direction){
		System.out.println(
			(_direction == Direction.LEFT?"왼쪽":"오른쪽") 
			+ "으로 방향 전환"); 
	}

	public void pickup() {
		System.out.println("물건 집어들기");
	}
}

public class RobotKit {
	private Robot robot = new Robot();
	private ArrayList<Command> commands new ArrayList<Command>();
	
	public void addCommand (Command command){
		commands.add(command);
	}
	public void start() {
		for (Command command : commands){
			command.setRobot(robot);
			command.execute();
	}
}