#include <bits/stdc++.h>
using namespace std;
int main() {
  long long int a, b, c, d, e, f;
  scanf("%lld", &a);
  scanf("%lld", &b);
  scanf("%lld", &c);
  scanf("%lld", &d);
  scanf("%lld", &e);
  scanf("%lld", &f);
  cout << "3" << endl;
  cout << a + c - e << " " << b + d - f << endl;
  cout << a + e - c << " " << b + f - d << endl;
  cout << e + c - a << " " << f + d - b << endl;
}
