#include <bits/stdc++.h>
using namespace std;
int main() {
  int x[3], y[3];
  for (int i = 0; i < 3; i++) cin >> x[i] >> y[i];
  cout << 3 << endl;
  cout << x[0] + x[1] - x[2] << " " << y[0] + y[1] - y[2] << endl;
  cout << x[0] + x[2] - x[1] << " " << y[0] + y[2] - y[1] << endl;
  cout << x[1] + x[2] - x[0] << " " << y[1] + y[2] - y[0] << endl;
}
