#include <iostream>
#include <array>
#include <vector>

using namespace std;

int main () {
    int N; cin >> N;
    array<int, 2> a, b, c;
    cin >> a[0] >> a[1];
    cin >> b[0] >> b[1];
    cin >> c[0] >> c[1];

    // 制約下でチャーリーの家囲める...笑

    cout << 4 << "\n";
    cout << c[0] + 1 << " " << c[1] << "\n";
    cout << c[0] - 1 << " " << c[1] << "\n";
    cout << c[0] << " " << c[1] + 1 << "\n";
    cout << c[0] << " " << c[1] - 1 << "\n";
}