#include <bits/stdc++.h>
using namespace std;
int main() {
  int x1, x2, x3, y1, y2, y3;
  while (scanf("%d%d%d%d%d%d", &x1, &y1, &x2, &y2, &x3, &y3) != EOF) {
    printf("3\n");
    printf("%d %d\n", (x2 + x3 - x1), (y2 + y3 - y1));
    printf("%d %d\n", (x1 + x2 - x3), (y1 + y2 - y3));
    printf("%d %d\n", (x1 + x3 - x2), (y1 + y3 - y2));
  }
  return 0;
}
