#include <iostream>
using namespace std;

int N;
int a[2], b[2], c[2];
const int dx[4] = {-1, 0, 1, 0}, dy[4] = {0, -1, 0, 1};

int main() {
    cin >> N;
    cin >> a[0] >> a[1] >> b[0] >> b[1] >> c[0] >> c[1];
    cout << 4 << endl;
    for (int i = 0; i < 4; i++)
        cout << c[0] + dx[i] << " " << c[1] + dy[i] << endl;
    return 0;
}