#include <bits/stdc++.h>
using namespace std;
int main() {
  int pts[3][2], dx, dy, nx, nxx;
  for (int i = 0; i < 3; i++) cin >> pts[i][0] >> pts[i][1];
  cout << 3 << endl;
  for (int i = 0; i < 3; i++) {
    nx = (i + 1) % 3;
    nxx = (i + 2) % 3;
    dx = pts[i][0] - pts[nx][0];
    dy = pts[i][1] - pts[nx][1];
    cout << pts[nxx][0] + dx << " " << pts[nxx][1] + dy << endl;
  }
  return 0;
}
