#include <bits/stdc++.h>
using namespace std;
void mego() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
}
int main() {
  mego();
  int x1, x2, x3, y1, y2, y3, c1x = 0, c1y = 0, c2x = 0, c2y = 0, c3x = 0,
                              c3y = 0;
  cin >> x1 >> y1 >> x2 >> y2 >> x3 >> y3;
  c1x = x1 - x2;
  c2x = x1 - x3;
  c3x = x2 - x3;
  c1y = y1 - y2;
  c2y = y1 - y3;
  c3y = y2 - y3;
  set<pair<int, int>> se;
  se.insert({x3 + c1x, y3 + c1y});
  se.insert({x3 - c1x, y3 - c1y});
  se.insert({x2 + c2x, y2 + c2y});
  se.insert({x2 - c2x, y2 - c2y});
  se.insert({x1 + c3x, y1 + c3y});
  se.insert({x1 - c3x, y1 - c3y});
  if (se.find({x1, y1}) != se.end()) se.erase({x1, y1});
  if (se.find({x2, y2}) != se.end()) se.erase({x2, y2});
  if (se.find({x3, y3}) != se.end()) se.erase({x3, y3});
  cout << se.size() << "\n";
  for (auto it : se) cout << it.first << " " << it.second << "\n";
  return 0;
}
