#include <bits/stdc++.h>
using namespace std;
struct Point {
  int x, y;
};
int main() {
  Point a, b, c;
  scanf("%d %d %d %d %d %d", &a.x, &a.y, &b.x, &b.y, &c.x, &c.y);
  printf("3\n%d %d\n", a.x + b.x - c.x, a.y + b.y - c.y);
  printf("%d %d\n", a.x + c.x - b.x, a.y + c.y - b.y);
  printf("%d %d\n", b.x + c.x - a.x, b.y + c.y - a.y);
  return 0;
}
