// 441_B.cpp   2024/08/23 21:03:13
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int mod = 998244353, mod1 = 1000000007, inf = 1070000000;
const ll linf = 4610000000000000000;
#define REP(i,x,y) for (auto i = (x); i < (y); i++)
#define RREP(i,x,y) for (auto i = (y) - 1; (x) <= i; i--)
#define ALL(x) (x).begin(), (x).end()
template<class T> bool inr(const T &l, const T &x, const T &r){return (l<=x && x<r);}
template<class T> bool chmax(T &a, const T &b){if(a < b){a = b; return 1;} else return 0;}
template<class T> bool chmin(T &a, const T &b){if(b < a){a = b; return 1;} else return 0;}
#include <atcoder/all>
using namespace atcoder;
#pragma GCC optimize("O3")
int main(){
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  int N;
  cin >> N;
  int ax,ay,bx,by,cx,cy;
  cin >> ax >> ay >> bx >> by >> cx >> cy;
  cout << 4 << '\n';
  cout << cx+1 << " " << cy << '\n';
  cout << cx-1 << " " << cy << '\n';
  cout << cx << " " << cy+1 << '\n';
  cout << cx << " " << cy-1 << '\n';
}