#include <bits/stdc++.h>
using namespace std;
using i64 = int64_t;
using vi = vector<i64>;
using vvi = vector<vi>;

struct vec2 {
    int x, y;
    vec2 operator+(const vec2 rhs) {
        return {x + rhs.x, y + rhs.y};
    }
    vec2 operator-(const vec2 rhs) {
        return {x - rhs.x, y - rhs.y};
    }
    vec2 operator/(const int k) {
        return {x / k, y / k};
    } 
    bool operator==(const vec2 rhs) {
        return x == rhs.x && y == rhs.y;
    }
};

int dot(vec2 a, vec2 b) {
    return a.x * b.x + a.y * b.y;
}

int dist2(vec2 a) {
    return dot(a, a);
}

int main() {
    vector<vec2> ps;
    for (int i = 0; i < 3; i++) {
        int x, y;
        cin >> x >> y;
        ps.push_back({x, y});
    }

    int cind = -1;
    for (int i = 0; i < 3; i++) {
        vector<vec2> dir;
        for (int j = 0; j < 3; j++) {
            if (i == j) continue;
            dir.push_back(ps[j] - ps[i]);
        }
        if (dot(dir[0], dir[1]) == 0 && dist2(dir[0]) == dist2(dir[1])) {
            vector<int> hoge;
            for (int k = 0; k < 3; k++) {
                if (k != i) {
                    hoge.push_back(k);
                }
            }
            vec2 z = ps[hoge[1]] + dir[0];
            cout << z.x << " " << z.y << endl;
            return 0;
        }
    }
    cout << -1 << endl;
}