#include <bits/stdc++.h>
using namespace std;
int main() {
  int x1, x2, x3, y1, y2, y3;
  scanf("%d %d %d %d %d %d", &x1, &y1, &x2, &y2, &x3, &y3);
  int dx1 = x1 - x2, dx2 = x2 - x3, dx3 = x3 - x1;
  int dy1 = y1 - y2, dy2 = y2 - y3, dy3 = y3 - y1;
  printf("3\n");
  printf("%d %d\n", x3 + dx1, y3 + dy1);
  printf("%d %d\n", x1 + dx2, y1 + dy2);
  printf("%d %d\n", x2 + dx3, y2 + dy3);
}
