#include <iostream>
#include <stdio.h>

using namespace std;

bool f(int x1,int y1,int x2,int y2,int x3,int y3){
	int dx2=x2-x1;
	int dy2=y2-y1;
	int dx3=x3-x1;
	int dy3=y3-y1;
	if(dx2*dx3+dy2*dy3!=0){
		return false;
	}
	if(dx2*dx2+dy2*dy2!=dx3*dx3+dy3*dy3){
		return false;
	}
	printf("%d %d\n",x1+dx2+dx3,y1+dy2+dy3);
	
	return true;
}


int main() {
	int x1,y1,x2,y2,x3,y3;
	scanf("%d %d %d %d %d %d",&x1,&y1,&x2,&y2,&x3,&y3);
	if(f(x1,y1,x2,y2,x3,y3)){
		return 0;
	}
	if(f(x2,y2,x1,y1,x3,y3)){
		return 0;
	}
	if(f(x3,y3,x1,y1,x2,y2)){
		return 0;
	}
	printf("-1\n");
	return 0;
}