#include <stdio.h>
#include <stdlib.h> 
#include <string.h>
#include <math.h>
#include <iostream>
#include <vector>
#include <algorithm>

using namespace std;

//namaega 184
//答えあわない・・・ 
 
int main(){
	int x[3],y[3];
	for(int i=0;i<3;i++)scanf("%d%d",&x[i],&y[i]);
	bool b=1;
	int s[3]={};
	int mx,my;
	int ida,idb;
	for(int i=0;i<3;i++){
		ida=(i+1)%3;
		idb=(i+2)%3; 
		if(x[i]==x[ida]&&y[i]==y[idb]&&abs(y[i]-y[ida])==abs(x[i]-x[idb])){
			printf("%d %d\n",x[idb],y[ida]);
			return 0;
		}
		else if(x[i]==x[idb]&&y[i]==y[ida]&&abs(y[i]-y[idb])==abs(x[i]-x[ida])){
			printf("%d %d\n",x[ida],y[idb]);
			return 0;
		}
		else if(x[i]==x[ida]&&abs(y[i]-y[ida])%2==0
			&&y[idb]==(y[i]+y[ida])/2&&abs(x[idb]-x[i])==abs(y[i]-y[ida])/2){
			printf("%d %d\n",x[idb]+(x[idb]-x[i])*2,y[idb]);
			return 0;
		}
		else if(x[i]==x[idb]&&abs(y[i]-y[idb])%2==0
			&&y[ida]==(y[i]+y[idb])/2&&abs(x[ida]-x[i])==abs(y[i]-y[idb])/2){
			printf("%d %d\n",x[ida]+(x[ida]-x[i])*2,y[ida]);
			return 0;
		}
		else if(y[i]==y[ida]&&abs(x[i]-x[ida])%2==0
			&&x[idb]==(x[i]+x[ida])/2&&abs(y[idb]-y[i])==abs(x[i]-x[ida])/2){
			printf("%d %d\n",x[idb],y[idb]+(y[idb]-y[i])*2);
			return 0;
		}
		else if(y[i]==y[idb]&&abs(x[i]-x[idb])%2==0
			&&x[ida]==(x[i]+x[idb])/2&&abs(y[ida]-y[i])==abs(x[i]-x[idb])/2){
			printf("%d %d\n",x[ida],y[ida]+(y[ida]-y[i])*2);
			return 0;
		}
	}
	printf("-1\n");
	return 0;
}