#include <iostream>
using namespace std;

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

int main()
{
	double P[3][2], C[3][2], A[3][2];

	for (int i = 0; i < 3; ++i)
	{
		for (int j = 0; j < 2; ++j)
		{
			cin >> P[i][j];
		}
	}

	C[0][0] = (P[0][0] + P[1][0]) / 2;
	C[0][1] = (P[0][1] + P[1][1]) / 2;
	C[1][0] = (P[1][0] + P[2][0]) / 2;
	C[1][1] = (P[1][1] + P[2][1]) / 2;
	C[2][0] = (P[2][0] + P[0][0]) / 2;
	C[2][1] = (P[2][1] + P[0][1]) / 2;

	A[0][0] = P[2][0] - 2 * (P[2][0] - C[0][0]);
	A[0][1] = P[2][1] - 2 * (P[2][1] - C[0][1]);
	A[1][0] = P[0][0] - 2 * (P[0][0] - C[1][0]);
	A[1][1] = P[0][1] - 2 * (P[0][1] - C[1][1]);
	A[2][0] = P[1][0] - 2 * (P[1][0] - C[2][0]);
	A[2][1] = P[1][1] - 2 * (P[1][1] - C[2][1]);

	if (san_hei(A[0][0] - P[2][0], A[0][1] - P[2][1]) == san_hei(P[0][0] - P[1][0], P[0][1] - P[1][1])
		&& san_hei(A[0][0] - P[0][0], A[0][1] - P[0][1]) == san_hei(A[0][0] - P[1][0], A[0][1] - P[1][1]))
		cout << (int)A[0][0] << " " << (int)A[0][1] << endl;
	else if (san_hei(A[1][0] - P[0][0], A[1][1] - P[0][1]) == san_hei(P[1][0] - P[2][0], P[1][1] - P[2][1])
		&& san_hei(A[1][0] - P[1][0], A[1][1] - P[1][1]) == san_hei(A[1][0] - P[2][0], A[1][1] - P[2][1]))
		cout << (int)A[1][0] << " " << (int)A[1][1] << endl;
	else if (san_hei(A[2][0] - P[1][0], A[2][1] - P[1][1]) == san_hei(P[2][0] - P[0][0], P[2][1] - P[0][1])
		&& san_hei(A[2][0] - P[2][0], A[2][1] - P[2][1]) == san_hei(A[2][0] - P[0][0], A[2][1] - P[0][1]))
		cout << (int)A[2][0] << " " << (int)A[2][1] << endl;
	else
		cout << -1 << endl;

	return 0;
}