#include <bits/stdc++.h>
using namespace std;
int main() {
  ios::sync_with_stdio(false);
  cin.tie(NULL);
  cout.tie(NULL);
  int x1, y1;
  cin >> x1 >> y1;
  int x2, y2;
  cin >> x2 >> y2;
  int x3, y3;
  cin >> x3 >> y3;
  cout << 3 << endl;
  cout << (x2 + x3 - x1) << ' ' << (y2 + y3 - y1) << endl;
  cout << (x1 + x3 - x2) << ' ' << (y1 + y3 - y2) << endl;
  cout << (x1 + x2 - x3) << ' ' << (y1 + y2 - y3) << endl;
}
