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

using ll = long long;
#define REP(i,n) for(ll i=0; i<(n); ++i)

int main() {
	ll x[3], y[3]; REP(i, 3) cin >> x[i] >> y[i];
	ll r[3]; REP(i, 3) r[i] = (x[i] - x[(i+1)%3])*(x[i] - x[(i+1)%3]) + (y[i] - y[(i+1)%3])*(y[i] - y[(i+1)%3]);
	REP(i, 3) if(r[i] == r[(i+1)%3] && r[i] + r[(i+1)%3] == r[(i+2)%3]){
		cout << x[(i+2)%3] + x[i] - x[(i+1)%3] << " " << y[(i+2)%3] + y[i] - y[(i+1)%3] << endl;
		return 0;
	}
	cout << -1 << endl;
}