#include <bits/stdc++.h>
using namespace std;
int main() {
  int x0, y0, x1, x2, y1, y2;
  cin >> x0 >> y0;
  cin >> x1 >> y1;
  cin >> x2 >> y2;
  cout << 3 << endl;
  cout << x1 + x2 - x0 << " " << y1 + y2 - y0 << endl;
  cout << x0 + x2 - x1 << " " << y0 + y2 - y1 << endl;
  cout << x1 - x2 + x0 << " " << y1 - y2 + y0 << endl;
  return 0;
}
