#include <bits/stdc++.h>
using namespace std;
int main() {
  int x0, y0, x[3], y[3], x1[3], y1[3];
  for (int i = 0; i < 3; i++) cin >> x[i] >> y[i];
  x0 = x[0] - x[1], y0 = y[0] - y[1];
  x1[0] = x[2] - x0, y1[0] = y[2] - y0;
  x1[1] = x[2] + x0, y1[1] = y[2] + y0;
  x0 = x[1] - x[2], y0 = y[1] - y[2];
  x1[2] = x[0] - x0, y1[2] = y[0] - y0;
  if (x1[2] == x1[0] || x1[2] == x1[1]) x1[2] = x[0] + x0, y1[2] = y[0] + y0;
  printf("%d\n", 3);
  for (int i = 0; i < 3; i++) cout << x1[i] << " " << y1[i] << endl;
  return 0;
}
