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