#include <iostream>
#include <cmath>
using namespace std;

int main() {
    int x1, y1, x2, y2, x3, y3;
    cin >> x1 >> y1 >> x2 >> y2 >> x3 >> y3;

    int d12 = (x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1);
    int d23 = (x3 - x2) * (x3 - x2) + (y3 - y2) * (y3 - y2);
    int d31 = (x1 - x3) * (x1 - x3) + (y1 - y3) * (y1 - y3);
    int dmax = max(d12, max(d23, d31));
    if (dmax == d31) {
        int dot = (x2 - x1) * (x3 - x2) + (y2 - y1) * (y3 - y2);
        if (d12 == d23 && dot == 0) {
            int x4 = x1 + (x3 - x2);
            int y4 = y1 + (y3 - y2);
            cout << x4 << " " << y4 << endl;
        } else {
            cout << -1 << endl;
        }
    } else if (dmax == d12) {
        int dot = (x1 - x3) * (x3 - x2) + (y1 - y3) * (y3 - y2);
        if (d23 == d31 && dot == 0) {
            int x4 = x1 - (x3 - x2);
            int y4 = y1 - (y3 - y2);
            cout << x4 << " " << y4 << endl;
        } else {
            cout << -1 << endl;
        }
    } else {
        int dot = (x2 - x1) * (x1 - x3) + (y2 - y1) * (y1 - y3);
        if (d31 == d12 && dot == 0) {
            int x4 = x2 - (x1 - x3);
            int y4 = y2 - (y1 - y3);
            cout << x4 << " " << y4 << endl;
        } else {
            cout << -1 << endl;
        }
    }   
}