#include <iostream>
using namespace std;
int main(){
	int x1, y1, x2, y2, x3, y3;
	cin >> x1 >> y1 >> x2 >> y2 >> x3 >> y3;
	int s12 = (x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1);
	int s23 = (x3 - x2) * (x3 - x2) + (y3 - y2) * (y3 - y2);
	int s31 = (x1 - x3) * (x1 - x3) + (y1 - y3) * (y1 - y3);
	if (s31 == s12 && (x2 - x1) * (x3 - x1) + (y2 - y1) * (y3 - y1) == 0){
		cout << x2 + x3 - x1 << ' ' << y2 + y3 - y1 << endl;
	} else if (s12 == s23 && (x3 - x2) * (x1 - x2) + (y3 - y2) * (y1 - y2) == 0){
		cout << x3 + x1 - x2 << ' ' << y3 + y1 - y2 << endl;
	} else if (s23 == s31 && (x1 - x3) * (x2 - x3) + (y1 - y3) *(y2 - y3) == 0){
		cout << x1 + x2 - x3 << ' ' << y1 + y2 - y3 << endl;
	} else {
		cout << -1 << endl;
	}
}