#include<iostream>
#include<cassert>
using namespace std;
int N;
int x[3],y[3];
const int d[5]={0,1,0,-1};
int main()
{
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	cin>>N;
	for(int i=0;i<3;i++)cin>>x[i]>>y[i];
	cout<<4<<endl;
	for(int r=0;r<4;r++)cout<<x[2]+d[r]<<" "<<y[2]+d[r+1]<<endl;
}