#include<cstdio>
#include<iostream>
#include<algorithm>
using namespace std;

int a[4],b[4],c[4],d[4],e[4],f[4];long long mx=0x3f3f3f3f3f3f3f3fll;
int ans[5][4],gs;

int main(){
	scanf("%lld %lld %lld %lld %lld %lld",&a[1],&b[1],&a[2],&b[2],&a[3],&b[3]);
	for(int i=1;i<=3;i++)e[i]=a[i],f[i]=b[i];sort(e+1,e+4);sort(f+1,f+4);
	int dqa=e[2],dqb=f[2];
	if(dqa!=a[1]){
		gs++;ans[gs][0]=dqa,ans[gs][1]=dqb;
		dqa=ans[gs][2]=a[1],ans[gs][3]=dqb;
	}
	if(dqb!=b[1]){
		gs++;ans[gs][0]=dqa,ans[gs][1]=dqb;
		ans[gs][2]=dqa,dqb=ans[gs][3]=b[1];
	}dqa=e[2],dqb=f[2];
	if(dqa!=a[2]){
		gs++;ans[gs][0]=dqa,ans[gs][1]=dqb;
		dqa=ans[gs][2]=a[2],ans[gs][3]=dqb;
	}
	if(dqb!=b[2]){
		gs++;ans[gs][0]=dqa,ans[gs][1]=dqb;
		ans[gs][2]=dqa,dqb=ans[gs][3]=b[2];
	}dqa=e[2],dqb=f[2];
	if(dqa!=a[3]){
		gs++;ans[gs][0]=dqa,ans[gs][1]=dqb;
		dqa=ans[gs][2]=a[3],ans[gs][3]=dqb;
	}
	if(dqb!=b[3]){
		gs++;ans[gs][0]=dqa,ans[gs][1]=dqb;
		ans[gs][2]=dqa,dqb=ans[gs][3]=b[3];
	}
	printf("%d\n",gs);
	for(int i=1;i<=gs;i++){
		printf("%d %d %d %d\n",ans[i][0],ans[i][1],ans[i][2],ans[i][3]);
	}
	return 0;
}