#include <bits/stdc++.h>
using namespace std;
class Point {
 public:
  int x, y;
  friend istream& operator>>(istream& cin, Point& p);
};
istream& operator>>(istream& cin, Point& p) {
  cin >> p.x >> p.y;
  return cin;
  ;
}
void fun(Point a, Point b, Point c) {
  Point d;
  d.x = a.x + b.x - c.x;
  d.y = a.y + b.y - c.y;
  cout << d.x << " " << d.y << endl;
}
int main() {
  Point a, b, c;
  cin >> a;
  cin >> b;
  cin >> c;
  cout << 3 << endl;
  fun(a, b, c);
  fun(b, c, a);
  fun(c, a, b);
}
