#include <bits/stdc++.h>
using namespace std;
using namespace std;
int main() {
  int first[7], second[7];
  for (int i = (1), _b = (3); i <= _b; ++i) cin >> first[i] >> second[i];
  cout << 3 << endl;
  cout << first[1] + first[3] - first[2] << " "
       << second[1] + second[3] - second[2] << endl;
  cout << first[1] + first[2] - first[3] << " "
       << second[1] + second[2] - second[3] << endl;
  cout << first[2] + first[3] - first[1] << " "
       << second[2] + second[3] - second[1] << endl;
  return 0;
}
