#include <bits/stdc++.h>
using namespace std;
int main() {
  int x, y;
  set<pair<int, int>> s;
  pair<int, int> a;
  pair<int, int> b;
  pair<int, int> c;
  pair<int, int> m;
  cin >> a.first >> a.second >> b.first >> b.second >> c.first >> c.second;
  x = a.first - b.first;
  y = a.second - b.second;
  s.insert({c.first - x, c.second - y});
  s.insert({c.first + x, c.second + y});
  x = a.first - c.first;
  y = a.second - c.second;
  s.insert({b.first - x, b.second - y});
  s.insert({b.first + x, b.second + y});
  x = c.first - b.first;
  y = c.second - b.second;
  s.insert({a.first - x, a.second - y});
  s.insert({a.first + x, a.second + y});
  cout << 3 << endl;
  for (auto i = s.begin(); i != s.end(); i++) {
    m = *i;
    cout << m.first << " " << m.second << endl;
  }
  return 0;
}
