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

int main(){

    cin.tie(nullptr);
    ios::sync_with_stdio(false);

    ll N;
    cin>>N;
    ll y,x;
    for(int i=0;i<3;i++)cin>>y>>x;
    cout<<4<<endl;
    cout<<y-1<<" "<<x<<endl;
    cout<<y+1<<" "<<x<<endl;
    cout<<y<<" "<<x-1<<endl;
    cout<<y<<" "<<x+1<<endl;
    

}