#include <bits/stdc++.h>
using namespace std;
struct vertex {
  int x, y;
} e[3], ans[3];
int main() {
  int i;
  for (i = 0; i < 3; i++) scanf("%d %d", &e[i].x, &e[i].y);
  ans[0].x = e[0].x + e[1].x - e[2].x;
  ans[0].y = e[0].y + e[1].y - e[2].y;
  ans[1].x = e[0].x + e[2].x - e[1].x;
  ans[1].y = e[0].y + e[2].y - e[1].y;
  ans[2].x = e[1].x + e[2].x - e[0].x;
  ans[2].y = e[1].y + e[2].y - e[0].y;
  printf("3\n");
  for (i = 0; i < 3; i++) printf("%d %d\n", ans[i].x, ans[i].y);
  return 0;
}
