#include <bits/stdc++.h>
int main() {
  int x1, x2, x3, y1, y2, y3;
  while (~scanf("%d %d %d %d %d %d", &x1, &y1, &x2, &y2, &x3, &y3)) {
    printf("3\n");
    printf("%d %d\n", x1 - x3 + x2, y1 - y3 + y2);
    printf("%d %d\n", x1 - x2 + x3, y1 - y2 + y3);
    printf("%d %d\n", x2 - x1 + x3, y2 - y1 + y3);
  }
}
