#include <bits/stdc++.h>
using namespace std;
int main() {
  long long int x1, x2, y1, y2, x3, y3, x, y;
  cin >> x1 >> y1;
  ;
  cin >> x2 >> y2;
  ;
  cin >> x3 >> y3;
  ;
  printf("3\n");
  x = x1 + x3 - x2;
  y = y1 + y3 - y2;
  cout << x << " " << y << endl;
  x = x1 + x2 - x3;
  y = y1 + y2 - y3;
  cout << x << " " << y << endl;
  x = x3 + x2 - x1;
  y = y3 + y2 - y1;
  cout << x << " " << y << endl;
  return 0;
}
