#include <iostream>
#include <string>
#include <vector>
#include <cmath>
#include <algorithm>
#include <cstdlib>
#include <ctime>
#include <cstdio>
#include <functional>
#include <set>

using namespace std;

//Ver2
int main()
{	
	vector<int> x(3),y(3);
	for(int i=0;i<3;i++) cin>>x[i]>>y[i];

	pair<int,int> l[3];
	for(int i=0;i<3;i++) 
		l[i]=make_pair((x[i]-x[(i+1)%3])*(x[i]-x[(i+1)%3])+(y[i]-y[(i+1)%3])*(y[i]-y[(i+1)%3]),i);

	sort(l,l+3);
	if(l[0].first==l[1].first && 2*l[0].first==l[2].first){

		if(l[2].second==0) cout<<x[0]+x[1]-x[2]<<" "<<y[0]+y[1]-y[2]<<endl;
		if(l[2].second==1) cout<<x[1]+x[2]-x[0]<<" "<<y[1]+y[2]-y[0]<<endl;
		if(l[2].second==2) cout<<x[0]+x[2]-x[1]<<" "<<y[0]+y[2]-y[1]<<endl;
		

	}else cout<<-1<<endl;

	return 0;
}