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