#include<iostream>
#include<sstream>
#include<cstdio>
#include<cstring>
#include<algorithm>
#include<string>
#include<vector>
#include<cmath>
#include<set>
#include<map>
#include<stack>
#include<queue>
#include<numeric>
#include<functional>
#include<complex>

using namespace std;
#define BET(a,b,c) ((a)<=(b)&&(b)<(c))
#define FOR(i,n) for(int i=0,i##_end=(int(n));i<i##_end;i++)
#define SZ(x) (int)(x.size())
#define ALL(x) (x).begin(),(x).end()
#define MP make_pair
#define FOR_EACH(it,v) for(__typeof(v.begin()) it=v.begin(),it_end=v.end() ; it != it_end ; it++)
typedef vector<int> VI;
typedef vector<VI> VVI;

int X[4],Y[4];

int sq(int x){ return x * x; }

int main()
{
    FOR(i,3) cin>>X[i]>>Y[i];
    FOR(i,3) {
        int x0 = X[i];
        int y0 = Y[i];
        int x1 = X[(i+1)%3];
        int y1 = Y[(i+1)%3];
        int x2 = X[(i+2)%3];
        int y2 = Y[(i+2)%3];
        int dx1 = x1 - x0;
        int dy1 = y1 - y0;
        int dx2 = x2 - x0;
        int dy2 = y2 - y0;
        if(sq(dx1) + sq(dy1) != sq(dx2) + sq(dy2))continue;
        if(dx1 * dy1 + dx2 * dy2 != 0) continue;
        cout<<x0+dx1+dx2<<" "<<y0+dy1+dy2<<endl;
        return 0;
    }
    cout<<-1<<endl;
    return 0;
}