#include <bits/stdc++.h>
using namespace std;
int main() {
  long long x1, y1, x2, y2, x3, y3, x4, y4;
  cin >> x1 >> y1;
  cin >> x2 >> y2;
  cin >> x3 >> y3;
  vector<pair<int, int> > v;
  x4 = x1 + x3 - x2;
  y4 = y1 + y3 - y2;
  v.push_back(make_pair(x4, y4));
  x4 = x2 + x3 - x1;
  y4 = y2 + y3 - y1;
  for (int i = 0; i < v.size(); i++) {
    if (v[i].first == x4 && v[i].second == y4) continue;
    v.push_back(make_pair(x4, y4));
  }
  x4 = x1 + x2 - x3;
  y4 = y1 + y2 - y3;
  int f = 0;
  for (int i = 0; i < v.size(); i++) {
    if (v[i].first == x4 && v[i].second == y4) f = 1;
  }
  if (f == 0) v.push_back(make_pair(x4, y4));
  cout << v.size() << "\n";
  for (int i = 0; i < v.size(); i++) {
    cout << v[i].first << " " << v[i].second << "\n";
  }
}
