#include <bits/stdc++.h>
using namespace std;
int main() {
  int Xa, Xb, Xc, Ya, Yb, Yc;
  cin >> Xa >> Ya >> Xb >> Yb >> Xc >> Yc;
  cout << 3 << endl;
  cout << Xa + Xb - Xc << ' ' << Ya + Yb - Yc << endl;
  cout << Xa + Xc - Xb << ' ' << Ya + Yc - Yb << endl;
  cout << Xb + Xc - Xa << ' ' << Yb + Yc - Ya << endl;
}
