/*
yukicoder No.55(Ver1)
作成者：ヒロソフ
*/

#include <stdio.h>

struct  Point {
	int X;
	int Y;
};

int main(void) {
	Point inPoint[3];

	scanf("%d %d %d %d %d %d", &inPoint[0].X, &inPoint[0].Y, &inPoint[1].X, &inPoint[1].Y, &inPoint[2].X, &inPoint[2].Y);


	//ソート
	for (int i = 0; i < 3; i++) {
		for (int j = 0; j < 2; j++) {
			if (inPoint[j].Y > inPoint[j + 1].Y) {
				Point pt = inPoint[j];
				inPoint[j] = inPoint[j + 1];
				inPoint[j + 1] = pt;
			}
		}
	}

	int lenp2[2];

	lenp2[0] = (inPoint[1].X - inPoint[0].X) * (inPoint[1].X - inPoint[0].X) + (inPoint[1].Y - inPoint[0].Y) * (inPoint[1].Y - inPoint[0].Y);
	lenp2[1] = (inPoint[1].X - inPoint[2].X) * (inPoint[1].X - inPoint[2].X) + (inPoint[1].Y - inPoint[2].Y) * (inPoint[1].Y - inPoint[2].Y);


	if (lenp2[0] != lenp2[1]) {
		
		for (int i = 0; i < 3; i++) {
			for (int j = 0; j < 2; j++) {
				if (inPoint[j].X > inPoint[j + 1].X) {
					Point pt = inPoint[j];
					inPoint[j] = inPoint[j + 1];
					inPoint[j + 1] = pt;
				}
			}
		}

		lenp2[0] = (inPoint[1].X - inPoint[0].X) * (inPoint[1].X - inPoint[0].X) + (inPoint[1].Y - inPoint[0].Y) * (inPoint[1].Y - inPoint[0].Y);
		lenp2[1] = (inPoint[1].X - inPoint[2].X) * (inPoint[1].X - inPoint[2].X) + (inPoint[1].Y - inPoint[2].Y) * (inPoint[1].Y - inPoint[2].Y);

		if (lenp2[0] != lenp2[1]) {
			printf("-1\n");
		} else {
			Point pt_Center;
			pt_Center.X = (inPoint[0].X + inPoint[2].X) / 2;
			pt_Center.Y = (inPoint[0].Y + inPoint[2].Y) / 2;

			Point diff;
			diff.X = pt_Center.X - inPoint[1].X;
			diff.Y = pt_Center.Y - inPoint[1].Y;

			printf("%d %d\n", inPoint[1].X + 2 * diff.X, inPoint[1].Y + 2 * diff.Y);

		}
	} else {

		Point pt_Center;
		pt_Center.X = (inPoint[0].X + inPoint[2].X) / 2;
		pt_Center.Y = (inPoint[0].Y + inPoint[2].Y) / 2;

		Point diff;
		diff.X = pt_Center.X - inPoint[1].X;
		diff.Y = pt_Center.Y - inPoint[1].Y;

		printf("%d %d\n", inPoint[1].X + 2 * diff.X, inPoint[1].Y + 2 * diff.Y);

	}
	return 0;
}