import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		int []X = new int[3];
		int []Y = new int[3];
		for(int i = 0; i < 3; i++) {
			X[i] = scan.nextInt();
			Y[i] = scan.nextInt();
		}

		scan.close();
		int ABx = X[1] - X[0];
		int ABy = Y[1] - Y[0];
		int ACx = X[2] - X[0];
		int ACy = Y[2] - Y[0];
		int BCx = X[2] - X[1];
		int BCy = Y[2] - Y[1];

		int lAB = norm(X[0], Y[0], X[1], Y[1]);
		int lAC = norm(X[0], Y[0], X[2], Y[2]);
		int lBC = norm(X[1], Y[1], X[2], Y[2]);

		if(lAB == lAC) {
			int k = ABx * ACx + ABy * ACy;
			if(k == 0) {
				int Mx = (X[1] + X[2]);
				int My = (Y[1] + Y[2]);
				int MAx = X[0] - Mx;
				int MAy = Y[0] - My;
				System.out.println(-MAx + " " + -MAy);
			}else {
				System.out.println(-1);
			}
		}else if(lAB == lBC) {
			int k = (-ABx) * BCx + (-ABy) * BCy;
			if(k == 0) {
				int Mx = (X[0] + X[2]);
				int My = (Y[0] + Y[2]);
				int MBx = X[1] - Mx;
				int MBy = Y[1] - My;
				System.out.println(-MBx + " " + -MBy);
			}else {
				System.out.println(-1);
			}
		}else if(lAC == lBC){
			int k = (-ACx) * (-BCx) + (-ACy) * (-BCy);
			if(k == 0) {
				int Mx = (X[0] + X[1]);
				int My = (Y[0] + Y[1]);
				int MCx = X[2] - Mx;
				int MCy = Y[2] - My;
				System.out.println(-MCx + " " + -MCy);
			}else {
				System.out.println(-1);
			}
		}else {
			System.out.println(-1);
		}

	}
	public static int norm(int x1, int y1, int x2, int y2) {
		int l = (x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2);
		return l;
	}
}