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