#include <bits/stdc++.h>
using namespace std;
int x1, x2, x3, ya, y2, y3;
set<pair<int, int> > point;
int main(int argc, char const *argv[]) {
  ios_base::sync_with_stdio(false);
  cin >> x1 >> ya >> x2 >> y2 >> x3 >> y3;
  point.insert(make_pair(x2 + x3 - x1, y2 + y3 - ya));
  point.insert(make_pair(x1 + x3 - x2, ya + y3 - y2));
  point.insert(make_pair(x1 + x2 - x3, ya + y2 - y3));
  cout << point.size() << endl;
  for (__typeof(point.begin()) it = point.begin(); it != point.end(); it++) {
    cout << it->first << " " << it->second << endl;
  }
  return 0;
}
