import java.util.Scanner;

public class Yukicoder55 {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int[] x = new int[4];
		int[] y = new int[4];
		int[][] pat = {{0, 1, 2}, {1, 0, 2}, {2, 0, 1}};

		for (int i = 0; i < 3; i++) {
			x[i] = sc.nextInt();
			y[i] = sc.nextInt();
		}
		for (int i = 0; i < 3; i++) {
			if (Math.hypot(x[pat[i][1]] - x[pat[i][0]], y[pat[i][1]] - y[pat[i][0]]) == Math.hypot(x[pat[i][2]] - x[pat[i][0]], y[pat[i][2]] - y[pat[i][0]])) {
				x[3] = x[pat[i][1]] + (x[pat[i][2]] - x[pat[i][0]]);
				y[3] = y[pat[i][1]] + (y[pat[i][2]] - y[pat[i][0]]);
				if (Math.hypot(x[3] - x[pat[i][0]], y[3] - y[pat[i][0]]) == Math.hypot(x[pat[i][2]] - x[pat[i][1]], y[pat[i][2]] - y[pat[i][1]])) {
					System.out.println(x[3] + " " + y[3]);
					return;
				}
			}
		}
		System.out.println("-1");
	}
}