#include <bits/stdc++.h>
using namespace std;
int main() {
  long int i, j, k, l, n;
  long int x1, x2, x3, y1, y2, y3, a1, a2, a3, b1, b2, b3;
  cin >> x1 >> y1 >> x2 >> y2 >> x3 >> y3;
  a1 = x1 + x2 - x3;
  b1 = y1 + y2 - y3;
  a2 = x2 + x3 - x1;
  b2 = y2 + y3 - y1;
  a3 = x3 + x1 - x2;
  b3 = y3 + y1 - y2;
  printf("3\n%ld %ld\n%ld %ld\n%ld %ld", a1, b1, a2, b2, a3, b3);
  return 0;
}
