#include <bits/stdc++.h>
using namespace std;
set<pair<long long, long long> > s;
set<pair<long long, long long> >::iterator it;
int main() {
  long long x1, x2, x3, y1, y2, y3;
  cin >> x1 >> y1 >> x2 >> y2 >> x3 >> y3;
  s.insert(make_pair(x1 + x2 - x3, y1 + y2 - y3));
  s.insert(make_pair(x1 + x3 - x2, y1 + y3 - y2));
  s.insert(make_pair(x2 + x3 - x1, y2 + y3 - y1));
  cout << s.size() << "\n";
  for (it = s.begin(); it != s.end(); it++) {
    cout << it->first << " " << it->second << "\n";
  }
  return 0;
}
