#include <iostream>
#include <vector>
#include <cmath>

int main(){
    std::ios::sync_with_stdio(false);
    std::cin.tie(0);
    
    std::vector<int> x(3);
    std::vector<int> y(3);

    for(int i=0; i<3; ++i){
        std::cin >> x[i] >> y[i];
    }
    for(int i=0; i<3; ++i){
        for(int j=0; j<2; ++j){
            bool argCondition  = (std::fabs(std::fmod(std::atan2(y[(i+1+j)%3]-y[i], x[(i+1+j)%3]-x[i])-std::atan2(y[(i+2-j)%3]-y[i], x[(i+2-j)%3]-x[i]), M_PI) - M_PI/2)<0.00001);
            bool distCondition = (std::fabs((std::pow(x[(i+1+j)%3]-x[i], 2)+std::pow(y[(i+1+j)%3]-y[i], 2)) - (std::pow(x[(i+2-j)%3]-x[i], 2)+std::pow(y[(i+2-j)%3]-y[i], 2)))<0.00001);
            if(argCondition && distCondition){
                std::cout << x[(i+1+j)%3] + (x[(i+2-j)%3] - x[i]) << " " << y[(i+1+j)%3] + (y[(i+2-j)%3] - y[i]) << "\n";
                return 0;
            }
        }
    }
    std::cout << -1 << "\n";       

    return 0;
}