import java.util.Scanner;

public class Main55 {
	public static void main(String[] args) {
		Main55 p = new Main55();
	}

	public Main55() {
		Scanner sc = new Scanner(System.in);
		int[] x = new int[3];
		int[] y = new int[3];
		for(int i=0;i<3;i++){
			x[i] = sc.nextInt();
			y[i] = sc.nextInt();
		}
		solve(x, y);
	}

	public void solve(int[] x, int[] y) {
		String res = "";		
		for(int i=0;i<3;i++){
			if((res = isOk(x[i], y[i], x[(i+1)%3], y[(i+1)%3], x[(i+2)%3], y[(i+2)%3])) != null){
				System.out.println(res);
				return;
			}
		}
		System.out.println("-1");
	}

	private String isOk(int x1, int y1, int x2, int y2, int x3, int y3){
		int vx1 = x1-x2;
		int vx2 = x3-x2;
		int vy1 = y1-y2;
		int vy2 = y3-y2;
		if(vx1*vy1+vx2*vy2==0 && (vx1*vx1+vy1*vy1) == (vx2*vx2+vy2*vy2))
			return (x2+vx1+vx2) + " " + (y2+vy1+vy2);
		else
			return null;
	}
	
}