#include <bits/stdc++.h>
using namespace std;
int main() {
  long long i, j, n, m, k, a, b;
  long long x[3], y[3];
  for (i = 0; i < 3; i++) cin >> x[i] >> y[i];
  cout << 3 << endl;
  for (i = 0; i < 3; i++)
    cout << (x[i] + x[(i + 1) % 3]) - x[(i + 2) % 3] << " "
         << (y[i] + y[(i + 1) % 3]) - y[(i + 2) % 3] << endl;
  return 0;
}
