#include <bits/stdc++.h>
using namespace std;
int x[5], y[5];
int main() {
  cin >> x[0] >> y[0] >> x[1] >> y[1] >> x[2] >> y[2];
  cout << 3 << endl;
  for (int i = 0; i < 3; i++) {
    int xx = 0, yy = 0;
    for (int j = 0; j < 3; j++) {
      if (j != i) {
        xx += x[j];
        yy += y[j];
      }
    }
    cout << xx - x[i] << " " << yy - y[i] << endl;
  }
}
