#include <bits/stdc++.h>
using namespace std;
int main() {
  pair<int, int> orig[3];
  int a, b, x1, y1, t = 0;
  for (int i = 0; i < 3; i++) {
    cin >> orig[i].first >> orig[i].second;
  }
  cout << "3" << endl;
  a = (orig[0].first + orig[1].first) / 2;
  b = (orig[0].second + orig[1].second) / 2;
  cout << (orig[0].first + orig[1].first - orig[2].first) << "	"
       << (orig[0].second + orig[1].second - orig[2].second) << endl;
  a = (orig[1].first + orig[2].first);
  b = (orig[1].second + orig[2].second);
  cout << (a - orig[0].first) << "	" << (b - orig[0].second) << endl;
  a = (orig[0].first + orig[2].first);
  b = (orig[0].second + orig[2].second);
  cout << (a - orig[1].first) << "	" << (b - orig[1].second) << endl;
}
