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

int dis(int x1, int x2, int y1, int y2) {
    return (x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2);
}

int main() {
    int x1, y1, x2, y2, x3, y3;
    cin >> x1 >> y1 >> x2 >> y2 >> x3 >> y3;
    int dis01 = dis(x1, x2, y1, y2);
    int dis02 = dis(x1, x3, y1, y3);
    int dis03 = dis(x2, x3, y2, y3);
    vector<int> d0 = {dis01, dis02, dis03};
    sort(d0.begin(), d0.end());
    if (d0[0] != d0[1]) {
        cout << -1 << endl;
        return 0;
    }
    if (d0[0] + d0[1] != d0[2]) {
        cout << -1 << endl;
        return 0;
    }
    for (int x4 = -100; x4 <= 100; x4++) {
        for (int y4 = -100; y4 <= 100; y4++) {
            int dis1 = dis(x1, x4, y1, y4);
            int dis2 = dis(x2, x4, y2, y4);
            int dis3 = dis(x3, x4, y3, y4);
            vector<int> d = {dis1, dis2, dis3};
            sort(d.begin(), d.end());
            if (d[0] != d[1]) continue;
            if (d[0] + d[1] == d[2]) {
                cout << x4 << ' ' << y4 << '\n';
                return 0;
            }
        }
    }
    cout << -1 << endl;
    return 0;
}