#include <bits/stdc++.h>
using namespace std;

int distSquare (int x1, int y1, int x2, int y2) {
    int d = (x2 - x1)*(x2 - x1) + (y2 - y1)*(y2 - y1);
    return d;
}

int calcX(int x1, int x2, int x3) {
    return x1 + x3 - x2;
}
int calcY(int y1, int y2, int y3) {
    return y1 + y3 - y2;
}

int main() {
    int X1,X2,X3,Y1,Y2,Y3;
    cin >> X1 >> Y1 >> X2 >> Y2 >> X3 >> Y3;
    int d12, d23, d31;
    d12 = distSquare(X1, Y1, X2, Y2);
    d23 = distSquare(X2, Y2, X3, Y3);
    d31 = distSquare(X3, Y3, X1, Y1);
    if (d12 != d23 && d23 != d31 && d31 != d12) {
        cout << -1 << endl;
        return 0;
    }
    if (d12 == d23 && d23 == d31 && d31 == d12) {
        cout << -1 << endl;
        return 0;
    }
    if (d12 == d23) {
        bool is = ((X2 - X1) * (X3 - X2) + (Y2 - Y1) * (Y3 - Y2) == 0);
        if (is) {
            int ansX = calcX(X1, X2, X3);
            int ansY = calcY(Y1, Y2, Y3);
            cout << ansX << " " << ansY << endl;
        } else {
            cout << -1 << endl;
        }
        return 0;
    }
    
    if (d23 == d31) {
        bool is = ((X3 - X2) * (X1 - X3) + (Y3 - Y2) * (Y1 - Y3) == 0);
        if (is) {
            int ansX = calcX(X2, X3, X1);
            int ansY = calcY(Y2, Y3, Y1);
            cout << ansX << " " << ansY << endl;
        } else {
            cout << -1 << endl;
        }
        return 0;
    }

    if (d31 == d12) {
        bool is = ((X1 - X3) * (X2 - X1) + (Y1 - Y3) * (Y2 - Y1) == 0);
        if (is) {
            int ansX = calcX(X3, X1, X2);
            int ansY = calcY(Y3, Y1, Y2);
            cout << ansX << " " << ansY << endl;
        } else {
            cout << -1 << endl;
        }
        return 0;
    }
}