#define _USE_MATH_DEFINES
#include<stdio.h>
#include<string>
#include<iostream>
#include<cctype>
#include<cstdio>
#include<vector>
#include<stack>
#include<queue>
#include <algorithm>
#include<math.h>
#include<set>
#include<map>
#include<iomanip>

//#include<bits/stdc++.h>


using namespace std;


int main() {
	
	int x[5] = {}, y[5] = {};
	for (int i = 0; i < 3; i++)cin >> x[i] >> y[i];
	for (int i = 0; i < 3; i++) {
		int da = x[0] - x[1],db=y[0]-y[1];
		int dx = x[2] - x[1], dy = y[2] - y[1];
		if (da*dx + db*dy == 0 && da*da + db*db == dx*dx + dy*dy) {
			cout << x[0]+x[2]-x[1] << " " << y[0] +y[2]-y[1] << endl;
			return 0;
		}
		int tx = x[0], ty = y[0];
		for (int j = 0; j < 2; j++) {
			x[j] = x[j+1], y[j ] = y[j+1];
		}
		x[2] = tx, y[2] = ty;
	//cout << x[0];

	}
	cout << -1 << endl;
	return 0;

}