#include <bits/stdc++.h>
using namespace std;

typedef struct { int x; int y; } point;

int Len2( const point &a, const point &b )
{
int i = a.x - b.x;
int j = a.y - b.y;

	return i * i + j * j;
}

void P4( point &New, const point &a, const point &b, const point &c )
{
	New.x = a.x + b.x - c.x;
	New.y = a.y + b.y - c.y;
}

int main()
{
int iA;
int iB;
int iC;
point A;
point B;
point C;
point New;

	cin >> A.x;
	cin >> A.y;
	cin >> B.x;
	cin >> B.y;
	cin >> C.x;
	cin >> C.y;

	iA = Len2( B, C );
	iB = Len2( A, C );
	iC = Len2( A, B );

	if( iB == iC && iB + iC == iA )
		P4( New, B, C, A );
	else if( iA == iC && iA + iC == iB )
		P4( New, A, C, B );
	else if( iA == iB && iA + iB == iC )
		P4( New, A, B, C );
	else
	{
		cout << - 1 << endl;

		return 0;
	}

	cout << New.x << " " << New.y << endl;

	return 0;
}