#include <iostream>
#include <algorithm>
#include <cstdio>
#include <string>
#include <vector>
#include <numeric>

#define ll long long

using namespace std;

int main(){
  
   int x1,y1,x2,y2,x3,y3;
   cin>>x1>>y1>>x2>>y2>>x3>>y3;
   int l1,l2,l3;
   l3=(x1-x2)*(x1-x2)+(y1-y2)*(y1-y2);
   l2=(x1-x3)*(x1-x3)+(y1-y3)*(y1-y3);
   l1=(x3-x2)*(x3-x2)+(y3-y2)*(y3-y2);
   
   if(l1==l2&&l1*2==l3){
       cout<<x2+x1-x3<<" "<<y2+y1-y3<<endl;
   }else if(l1==l3&&l1*2==l2){
       cout<<x1+x3-x2<<" "<<y1+y3-y2<<endl;       
   }else if(l2==l3&&l2*2==l1){
       cout<<x2+x3-x1<<" "<<y2+y3-y1<<endl;         
   }else{
       cout<<-1<<endl;
   }

   return 0;
}