#include <bits/stdc++.h>
using namespace std;
int main() {
  int a, a2, b, b2, c, c2;
  cin >> a >> a2 >> b >> b2 >> c >> c2;
  cout << 3 << endl;
  cout << a + b - c << " " << a2 + b2 - c2 << endl;
  cout << b + c - a << " " << b2 + c2 - a2 << endl;
  cout << c + a - b << " " << c2 + a2 - b2 << endl;
  return 0;
}
