#include <bits/stdc++.h>
#define rep(i, n) for(long long i = 0; i < n; i++)
#define ALL(v) (v).begin(), (v).end()
#define rALL(v) (v).rbegin(), (v).rend()
using namespace std;

using lint = long long;

int main() {
    vector<pair<int, int>> xy(3);
    rep(i, 3) {
        cin >> xy[i].first >> xy[i].second;
    }
    auto dist = [](int x1, int y1, int x2, int y2) {
        return (x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2);
    };
    auto right = [](int x1, int y1, int x2, int y2) {
        return x1 * x2 + y1 * y2 == 0;
    };
    vector<int> id = {0, 1, 2};
    do {
        auto [x1, y1] = xy[id[0]];
        auto [x2, y2] = xy[id[1]];
        auto [x3, y3] = xy[id[2]];
        if (dist(x1, y1, x2, y2) == dist(x2, y2, x3, y3) && right(x1 - x2, y1 - y2, x3 - x2, y3 - y2)) {
            int x4 = x3 + (x1 - x2);
            int y4 = y3 + (y1 - y2);
            cout << x4 << " " << y4 << endl;
            return 0;
        }
    } while (next_permutation(ALL(id)));
    cout << -1 << endl;
}