#include <bits/stdc++.h>
using namespace std;
int main() {
  int x1, x2, x3, y1, y2, y3, m1, m2, m3, n1, n2, n3;
  cin >> x1 >> y1 >> x2 >> y2 >> x3 >> y3;
  m1 = x1 + x2 - x3;
  n1 = y1 + y2 - y3;
  m2 = x1 + x3 - x2;
  n2 = y1 + y3 - y2;
  m3 = x2 + x3 - x1;
  n3 = y2 + y3 - y1;
  cout << "3"
       << "\n";
  cout << m1 << " " << n1 << "\n";
  cout << m2 << " " << n2 << "\n";
  cout << m3 << " " << n3;
}
