#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair<char,int> P;
typedef pair<int,char> Q;
#define REP(i,n) for(int i=0;i<int(n);i++)





int main(){
	cin.tie(nullptr);  ios_base::sync_with_stdio(false);
    int i,j,k;



    int N;
     cin >> N;

     vector<int> x(3),y(3);
     REP(i,3) cin >> x[i] >> y[i];

     cout << 4 << endl;
     cout << x[2]-1 << ' ' << y[2] << endl;
     cout << x[2]+1 << ' ' << y[2] << endl;
     cout << x[2] << ' ' << y[2]-1 << endl;
     cout << x[2] << ' ' << y[2]+1 << endl;



	return 0;

}