#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define llong long long

vector<int> x(3);
vector<int> y(3);

int dob(int val) {
    return val * val;
}

int getlen2(int i, int j) {
    return dob(abs(x[i] - x[j])) + dob(abs(y[i] - y[j]));
}

bool isotri(int v, int h, int d) {
    return v == h && d == 2*h;
}

int main() {
    rep(i, 3) cin >> x[i] >> y[i];

    int z01 = getlen2(0, 1);
    int z12 = getlen2(1, 2);
    int z20 = getlen2(2, 0);

    int maxval = max(max(z01, z12), z20);
    if((
               maxval == z01 && isotri(z12, z20, z01)
            || maxval == z12 && isotri(z20, z01, z12)
            || maxval == z20 && isotri(z01, z12, z20)
        )
        && maxval > 0
    ) {
        int x0, y0;
        if(maxval == z01) {
            //ベクトルで考える
            x0 = x[1] + x[0] - x[2];
            y0 = y[1] + y[0] - y[2];
        } else if(maxval == z12) {
            x0 = x[1] + x[2] - x[0];
            y0 = y[1] + y[2] - y[0];
        } else {
            x0 = x[0] + x[2] - x[1];
            y0 = y[0] + y[2] - y[1];
        }
        cout << x0 << " " << y0 << "\n";
    } else {
        cout << -1 << "\n";
    }
}