// yukicoder: No.55 正方形を描くだけの簡単なお仕事です。
// 2019.5.13 bal4u

#include <stdio.h>

int x[5], y[5];

int dis2(int i, int j) {
	int dx = x[i]-x[j], dy = y[i]-y[j];
	return dx*dx + dy*dy;
}

int main()
{
	int i, a, b, dx, dy;

	for (i = 1; i <= 3; i++) scanf("%d%d", x+i, y+i);
	x[0] = x[3], y[0] = y[3], x[4] = x[1], y[4] = y[1];
	for (i = 1; i <= 3; i++) {
		a = dis2(i, i-1), b = dis2(i, i+1);
		if (a == b) break;
	}
	if (i > 3) goto NG;
	if (2*a != dis2(i-1, i+1)) goto NG;
	printf("%d %d\n", x[i-1]+x[i+1]-x[i], y[i-1]+y[i+1]-y[i]);
	return 0;
NG: puts("-1");
	return 0;
}