#include <bits/stdc++.h>
using namespace std;
void printans(int x1, int y1, int x2, int y2, int x3, int y3) {
  cout << x2 + x3 - x1 << " " << y3 + y2 - y1 << "\n";
}
int main() {
  int x1, x2, x3, y1, y2, y3, x4, y4;
  cin >> x1 >> y1 >> x2 >> y2 >> x3 >> y3;
  cout << 3 << "\n";
  printans(x1, y1, x2, y2, x3, y3);
  printans(x2, y2, x3, y3, x1, y1);
  printans(x3, y3, x1, y1, x2, y2);
}
