import java.awt.*;
import java.util.ArrayList;

/**
 * Created by IntelliJ IDEA.
 * User: Alowan
 * Date: 16-dec-2009
 * Time: 18:15:30
 * This code is for educational purposes only!
 */
public class Main {
	public static void main(String[] args) {
		ArrayList<Point> points = new ArrayList<Point>();
		points.add(new Point(1,1));
		points.add(new Point (5,5));
		points.add(new Point(1,2));
		points.add(new Point(5,4));
		points.add(new Point(2,2));
		points.add(new Point(4,4));
		ArrayList<ArrayList<Point>> connectedPointsList = new ArrayList<ArrayList<Point>>();
		while(points.size() > 0) {
			connectedPointsList.add(getConnected(points.get(0), points, new ArrayList<Point>()));
		}
		for(ArrayList<Point> ps : connectedPointsList) {
			for(Point p : ps) {
				System.out.println(p);
			}
			System.out.println("-----------------------");
		}
	}


	private static ArrayList<Point> getConnected(Point p, ArrayList<Point> allPoints, ArrayList<Point> connectedPoints) {
		connectedPoints.add(p);
		allPoints.remove(p);
		Point p1 = new Point(p.x - 1, p.y);
		Point p2 = new Point(p.x + 1, p.y);
		Point p3 = new Point(p.x, p.y - 1);
		Point p4 = new Point(p.x, p.y + 1);
		for(Point pX : new Point[] {p1, p2, p3, p4}) {
			if(allPoints.contains(pX) && !connectedPoints.contains(pX)) {
				getConnected(pX, allPoints, connectedPoints);
			}
		}
		return connectedPoints;
	}
}