#include <bits/stdc++.h>
#include <atcoder/all>
using ll = long long;
#define MOD 1000000007
#define Mod 998244353
const int MAX = 1000000005;
const long long INF = 1000000000000000005LL;
using namespace std;
using namespace atcoder;



int main() {
    ios::sync_with_stdio(0);cin.tie();
    int N;
    cin >> N;
    int ax, ay, bx, by, cx, cy;
    cin >> ax >> ay >> bx >> by >> cx >> cy;
    cout << 4 << endl;
    cout << cx-1 << " " << cy << endl;
    cout << cx << " " << cy+1 << endl;
    cout << cx+1 << " " << cy << endl;
    cout << cx << " " << cy-1 << endl;
}