#include <bits/stdc++.h>
using namespace std;
using namespace std;
const int MAXN = (long long int)2e5 + 100;
int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  long long int a, b, c, d, e, f;
  cin >> a >> b >> c >> d >> e >> f;
  cout << "3" << endl;
  cout << a + c - e << " " << b + d - f << endl;
  cout << a + e - c << " " << b + f - d << endl;
  cout << c + e - a << " " << d + f - b << endl;
  return 0;
}
