#include <bits/stdc++.h>
using namespace std;
template <class T1>
void deb(T1 e1) {
  cerr << "--> " << e1 << endl;
}
template <class T1, class T2>
void deb(T1 e1, T2 e2) {
  cerr << "--> " << e1 << " " << e2 << endl;
}
template <class T1, class T2, class T3>
void deb(T1 e1, T2 e2, T3 e3) {
  cerr << "--> " << e1 << " " << e2 << " " << e3 << endl;
}
template <class T1, class T2, class T3, class T4>
void deb(T1 e1, T2 e2, T3 e3, T4 e4) {
  cerr << "--> " << e1 << " " << e2 << " " << e3 << " " << e4 << endl;
}
template <class T1, class T2, class T3, class T4, class T5>
void deb(T1 e1, T2 e2, T3 e3, T4 e4, T5 e5) {
  cerr << "--> " << e1 << " " << e2 << " " << e3 << " " << e4 << " " << e5
       << endl;
}
template <class T1, class T2, class T3, class T4, class T5, class T6>
void deb(T1 e1, T2 e2, T3 e3, T4 e4, T5 e5, T6 e6) {
  cerr << "--> " << e1 << " " << e2 << " " << e3 << " " << e4 << " " << e5
       << " " << e6 << endl;
}
int main() {
  int ax, ay, bx, by, cx, cy;
  scanf("%d %d", &ax, &ay);
  scanf("%d %d", &bx, &by);
  scanf("%d %d", &cx, &cy);
  int x = cx - bx + ax;
  int y = cy - by + ay;
  set<pair<int, int> > st;
  st.insert(make_pair(cx - ax + bx, cy - ay + by));
  st.insert(make_pair(x, y));
  st.insert(make_pair(bx - cx + ax, by - cy + ay));
  printf("%d\n", st.size());
  set<pair<int, int> >::iterator it;
  for (it = st.begin(); it != st.end(); it++) {
    printf("%d %d\n", it->first, it->second);
  }
  return 0;
}
