import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        Point p1 = new Point(sc.nextInt(), sc.nextInt());
        Point p2 = new Point(sc.nextInt(), sc.nextInt());
        Point p3 = new Point(sc.nextInt(), sc.nextInt());
        int d1 = p2.getD(p3);
        int d2 = p3.getD(p1);
        int d3 = p1.getD(p2);
        Point p4;
        if (d1 == d2 && d1 * 2 == d3) {
            p4 = p3.getAnother(p1, p2);
        } else if (d2 == d3 && d2 * 2 == d1) {
            p4 = p1.getAnother(p2, p3);
        } else if (d3 == d1 && d3 * 2 == d2) {
            p4 = p2.getAnother(p3, p1);
        } else {
            System.out.println(-1);
            return;
        }
        System.out.println(p4);
    }
    
    static class Point {
        int x;
        int y;
        
        public Point(int x, int y) {
            this.x = x;
            this.y = y;
        }
        
        public int getD(Point another) {
            return (x - another.x) * (x - another.x) + (y - another.y) * (y - another.y);
        }
        
        public Point getAnother(Point p1, Point p2) {
            return new Point(p1.x + p2.x - x, p1.y + p2.y - y);
        }
        
        public String toString() {
            return x + " " + y;
        }
    }
}