#include <bits/stdc++.h>
#define syosu(x) fixed<<setprecision(x)
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int,int> P;
typedef pair<double,double> pdd;
typedef pair<ll,ll> pll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<double> vd;
typedef vector<vd> vvd;
typedef vector<ll> vl;
typedef vector<vl> vvl;
typedef vector<string> vs;
typedef vector<P> vp;
typedef vector<vp> vvp;
typedef vector<pll> vpll;
typedef pair<int,P> pip;
typedef vector<pip> vip;
const int inf=1<<30;
const ll INF=1ll<<60;
const double pi=acos(-1);
const double eps=1e-9;
const ll mod=1e9+7;
const int dx[4]={0,1,0,-1},dy[4]={1,0,-1,0};

int x[3],y[3];

int main(){
	for(int i=0;i<3;i++) cin>>x[i]>>y[i];
	for(int i=0;i<3;i++){
		int a=x[1]-x[0],b=y[1]-y[0],A=x[2]-x[0],B=y[2]-y[0];
		if(a*A+b*B==0&&a*a+b*b==A*A+B*B){
			cout<<x[0]+a+A<<' '<<y[0]+b+B<<endl;
			return 0;
		}
		swap(x[0],x[1]);swap(y[0],y[1]);
		swap(x[1],x[2]);swap(y[1],y[2]);
	}
	cout<<-1<<endl;
}