/* -*- coding: utf-8 -*-
 *
 * 2843.cc:  No.2843 Birthday Present Struggle - yukicoder
 */

#include<cstdio>
#include<algorithm>

using namespace std;

/* main */

int main() {
  int n, ax, ay, bx, by, cx, cy;
  scanf("%d%d%d%d%d%d%d", &n, &ax, &ay, &bx, &by, &cx, &cy);
  
  puts("4");
  printf("%d %d\n", cx - 1, cy);
  printf("%d %d\n", cx + 1, cy);
  printf("%d %d\n", cx, cy - 1);
  printf("%d %d\n", cx, cy + 1);

  return 0;
}