#include <bits/stdc++.h>
using namespace std;

vector<int> di = {-1, 0, 1, 0};
vector<int> dj = {0, 1, 0, -1};

int main() {
    int n, ax, ay, bx, by, cx, cy;
    cin >> n >> ax >> ay >> bx >> by >> cx >> cy;
    cout << 4 << endl;
    for (int i = 0; i < 4; i++) {
        cout << cx + di[i] << " " << cy + dj[i] << endl;
    }
}