#include<bits/stdc++.h>
using namespace std;
long long x[5],y[5];
struct L{
    int x1,x2,y1,y2;
};
vector<L>ans;
void Link(int x1,int y1,int x2,int y2){
    if(x1==x2&&y1==y2)return;
    ans.push_back((L){x1,x2,y1,y2});
}
int main(){
    scanf("%lld %lld %lld %lld %lld %lld",&x[1],&y[1],&x[2],&y[2],&x[3],&y[3]);
    if(x[1]>x[2])swap(x[1],x[2]),swap(y[1],y[2]);
    if(x[1]>x[3])swap(x[1],x[3]),swap(y[1],y[3]);
    if(x[2]>x[3])swap(x[2],x[3]),swap(y[2],y[3]);
    if(y[2]>y[1]&&y[2]>y[3]){
        Link(x[1],y[1],x[2],y[1]),Link(x[3],y[3],x[2],y[3]);
        Link(x[2],y[2],x[2],min(y[1],y[3]));
    }else if(y[2]<y[1]&&y[2]<y[3]){
        Link(x[1],y[1],x[2],y[1]),Link(x[3],y[3],x[2],y[3]);
        Link(x[2],y[2],x[2],max(y[1],y[3]));
    }else {
        Link(x[1],y[1],x[2],y[1]),Link(x[3],y[3],x[2],y[3]);
        Link(x[2],y[1],x[2],y[3]);
    }
    printf("%d\n",(int)ans.size());
    for(auto t:ans){
        printf("%d %d %d %d\n",t.x1,t.y1,t.x2,t.y2);
    }
}