#include <stdio.h>
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using mint = modint998244353;
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf32 1000000001
#define Inf64 1000000000000000001

int main(){
	
	int n;
	cin>>n;
	int a,b,c,d,e,f;
	cin>>a>>b>>c>>d>>e>>f;
	cout<<4<<endl;
	cout<<e<<' '<<f+1<<endl;
	cout<<e<<' '<<f-1<<endl;
	cout<<e+1<<' '<<f<<endl;
	cout<<e-1<<' '<<f<<endl;
	
    return 0;
}