#include <bits/stdc++.h>
using namespace std;
#define rep(i, s, n) for (int i = (s); i < (int)(n); i++)
#include <atcoder/all>
using namespace atcoder;
using mint1 = modint1000000007;
using mint2 = modint998244353;
using ll = long long;
using ull = unsigned long long;
using ld = long double;
ld pi=3.141592653589793;
const int inf=2e9;
const ll linf=2e18;
const ld eps=1e-14;
#define Yes cout << "Yes" << endl
#define No cout << "No" << endl

int main() {
    ll n;
    cin >> n;
    ll ax,ay,bx,by,cx,cy;
    cin >> ax >> ay >> bx >> by >> cx >> cy;
    cout << 4 << endl;
    cout << cx+1 << " " << cy << endl;
    cout << cx-1 << " " << cy << endl;
    cout << cx << " " << cy+1 << endl;
    cout << cx << " " << cy-1 << endl;
}