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

using ll = long long;
#define rep(i, n) for(ll i = 0; i < n; i++)

int main() {
	int N, ax, ay, bx, by, cx, cy;
	cin >> N >> ax >> ay >> bx >> by >> cx >> cy;
	cout << 4 << endl;
	vector<int> dy{1, -1, 0, 0}, dx{0, 0, 1, -1};
	rep(i, 4) {
		int nx = cx + dx[i];
		int ny = cy + dy[i];
		cout << nx << " " << ny << endl;
	}
}