#include <bits/stdc++.h>
using namespace std;
set<pair<int, int> > s;
int x[3];
int y[3];
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  ;
  for (int(i) = (0); (i) < (3); (i)++) cin >> x[i] >> y[i];
  for (int(i) = (0); (i) < (3); (i)++) {
    for (int(j) = (0); (j) < (3); (j)++)
      if (j != i) {
        int dx = x[j] - x[i];
        int dy = y[j] - y[i];
        for (int(k) = (0); (k) < (3); (k)++)
          if (k != j && k != i) {
            int u = x[k] + dx;
            int v = y[k] + dy;
            s.insert(make_pair((u), (v)));
          }
      }
  }
  cout << ((int)s.size()) << endl;
  for (auto e : s) {
    cout << e.first << " " << e.second << endl;
  }
  return 0;
}
