#include <bits/stdc++.h>
using namespace std;
int main() {
  int x1, x2, x3, y1, y2, y3;
  cin >> x1 >> y1 >> x2 >> y2 >> x3 >> y3;
  cout << "3" << endl;
  cout << x1 - x2 + x3 << " " << y1 - y2 + y3 << endl;
  cout << x2 - x1 + x3 << " " << y2 - y1 + y3 << endl;
  cout << x1 - x3 + x2 << " " << y1 - y3 + y2 << endl;
  return 0;
}
