#include <bits/stdc++.h>
using namespace std;
long long ax, ay, bx, by, cx, cy;
int main() {
  scanf("%lld %lld %lld %lld %lld %lld", &ax, &ay, &bx, &by, &cx, &cy);
  printf("3\n%lld %lld\n%lld %lld\n%lld %lld\n", ax - bx + cx, ay - by + cy,
         ax - cx + bx, ay - cy + by, bx - ax + cx, by - ay + cy);
  return 0;
}
