#include <bits/stdc++.h>
using namespace std;
int main() {
  int xa, ya, xb, yb, xc, yc;
  cin >> xa >> ya >> xb >> yb >> xc >> yc;
  cout << 3 << endl;
  cout << xa + xb - xc << " " << ya + yb - yc << endl;
  cout << xa - xb + xc << " " << ya - yb + yc << endl;
  cout << -xa + xb + xc << " " << -ya + yb + yc;
}
