#include <bits/stdc++.h>
using namespace std;
int x[4], y[4];
int main() {
  for (int i = 1; i <= 3; i++) cin >> x[i] >> y[i];
  cout << 3 << endl;
  cout << x[3] - x[1] + x[2] << " " << y[3] - y[1] + y[2] << endl;
  cout << x[1] - x[3] + x[2] << " " << y[1] - y[3] + y[2] << endl;
  cout << x[1] + x[3] - x[2] << " " << y[1] + y[3] - y[2] << endl;
}
