#include <stdio.h>
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using mint = modint998244353;
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf 1000000

int main(){
	
	vector<int> x(3),y(3);
	
	rep(i,3){
		cin>>x[i]>>y[i];
	}
	
	rep(i,3){
		int a = (i+1)%3,b = (i+2)%3;
		
		int adx = x[a] - x[i],ady = y[a]-y[i];
		int bdx = x[b] - x[i],bdy = y[b]-y[i];
		if(abs(adx)!=abs(bdy)||abs(ady)!=abs(bdx))continue;
		if(adx*bdx+ady*bdy!=0)continue;
		cout<<x[i] + adx + bdx<<' '<<y[i] + ady + bdy<<endl;
		return 0;
	}
	
	cout<<-1<<endl;
	
	return 0;
}