#include <bits/stdc++.h>
using namespace std;
int main() {
  int ax, ay, bx, by, cx, cy;
  cin >> ax >> ay >> bx >> by >> cx >> cy;
  cout << 3 << endl;
  int dx = ax + bx - cx;
  int dy = ay + by - cy;
  cout << dx << " " << dy << endl;
  dx = ax + cx - bx;
  dy = ay + cy - by;
  cout << dx << " " << dy << endl;
  dx = bx + cx - ax;
  dy = by + cy - ay;
  cout << dx << " " << dy << endl;
  return 0;
}
