// No.55 正方形を描くだけの簡単なお仕事です。
#include <iostream>
#include <vector>
using namespace std;

int main() {
    vector<int> X(3);
    vector<int> Y(3);
    for (int i = 0; i < 3; ++i) cin >> X[i] >> Y[i];
    for (int i = 0; i < 3; ++i) {
        int dx1 = X[(i + 2) % 3] - X[i];
        int dy1 = Y[(i + 2) % 3] - Y[i];
        int dx2 = X[(i + 1) % 3] - X[i];
        int dy2 = Y[(i + 1) % 3] - Y[i];
        if (dx1 * dx2 + dy1 * dy2 != 0) continue;
        if (dx1 * dx1 + dy1 * dy1 != dx2 * dx2 + dy2 * dy2) continue;
        cout << X[(i + 1) % 3] + dx1 << " ";
        cout << Y[(i + 1) % 3] + dy1 << endl;
        return 0;
    }
    cout << -1 << endl;
}