#include <iostream>
#include <vector>
#include <algorithm>

using namespace std;

int norm2(int x, int y)
{
	return x * x + y * y;
}

int dot(int ax, int ay, int bx, int by)
{
	return ax * bx + ay * by;
}

bool can(int X1, int Y1, int X2, int Y2, int X3, int Y3, int &X4, int &Y4)
{
	int ax = X2 - X1;
	int ay = Y2 - Y1;
	int bx = X3 - X2;
	int by = Y3 - Y2;
	if (norm2(ax, ay) == norm2(bx, by) && dot(ax, ay, bx, by) == 0) {
		X4 = X3 - ax;
		Y4 = Y3 - ay;
		return true;
	} else {
		return false;
	}
}

int main()
{
	int X1, Y1, X2, Y2, X3, Y3;
	cin >> X1 >> Y1 >> X2 >> Y2 >> X3 >> Y3;
	int X4, Y4;
	if (can(X1, Y1, X2, Y2, X3, Y3, X4, Y4)) {
		cout << X4 << " " << Y4 << endl;
	} else if (can(X3, Y3, X1, Y1, X2, Y2, X4, Y4)) {
		cout << X4 << " " << Y4 << endl;
	} else if (can(X2, Y2, X3, Y3, X1, Y1, X4, Y4)) {
		cout << X4 << " " << Y4 << endl;
	} else {
		cout << -1 << endl;
	}
}