#include <iostream>

using namespace std;

struct Point {
	int x;
	int y;
};

int main() {
	Point p[3];
	for (int i = 0; i < 3; ++i) {
		cin >> p[i].x >> p[i].y;
	}
	int n0;
	for (n0 = 0; n0 < 3; ++n0) {
		int n1 = (n0 + 1) % 3;
		int n2 = (n0 + 2) % 3;
		Point v1 = { p[n1].x - p[n0].x, p[n1].y - p[n0].y };
		Point v2 = { p[n2].x - p[n0].x, p[n2].y - p[n0].y };
		int dot = v1.x * v2.x + v1.y * v2.y;
		if (dot == 0) {
			int norm1 = v1.x * v1.x + v1.y * v1.y;
			int norm2 = v2.x * v2.x + v2.y * v2.y;
			if (norm1 == norm2) {
				Point p3 = { p[n0].x + v1.x + v2.x, p[n0].y + v1.y + v2.y };
				cout << p3.x << " " << p3.y << endl;
				break;
			}
		}
	}
	if (n0 == 3) {
		cout << -1 << endl;
	}
	return 0;
}