#include <bits/stdc++.h>
using namespace std;
int main() {
  int a, b, c, d, e, f;
  cin >> a >> b >> c >> d >> e >> f;
  cout << "3\n";
  cout << c + e - a << " " << d + f - b << "\n";
  cout << a + e - c << " " << b + f - d << "\n";
  cout << a + c - e << " " << b + d - f << "\n";
  return 0;
}
