#include <bits/stdc++.h>
using namespace std;
#define int long long
signed main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    vector<pair<int,int>> a(3);
    for(int i=0;i<3;++i) cin>>a[i].first>>a[i].second;
    for(int i=0;i<3;++i) for(int j=0;j<3;++j) if(i!=j) a.push_back({a[i].first, a[j].second});
    int ALL=6;
    pair<long long, vector<tuple<int,int,int,int>>> ans={-1, vector<tuple<int,int,int,int>>()};
    for(int j=0;j<(1<<ALL);++j)
    {
        vector<pair<int,int>> b;
        b.push_back(a[0]); b.push_back(a[1]); b.push_back(a[2]);
        vector<tuple<int,int,int>> ed;
        for(int i=0;i<ALL;++i) if(j>>i&1) b.push_back(a[i+3]);
        for(int i=0;i<b.size();++i) for(int jj=i+1;jj<b.size();++jj)
        {
            if(b[i].first==b[jj].first) ed.push_back({abs(b[i].second - b[jj].second), i, jj});
            else if(b[i].second==b[jj].second) 
                ed.push_back({abs(b[i].first-b[jj].first), i, jj});
        }
        sort(ed.begin(), ed.end());
        vector<int> fa(b.size());
        for(int i=0;i<b.size();++i) fa[i]=i;
        function<int(int)> getf = [&](int x) { return fa[x]==x?x:fa[x]=getf(fa[x]); };
        vector<tuple<int,int,int,int>> v;
        int _=0;
        for(int i=0;i<ed.size();++i) 
        {
            auto [w, x, y] = ed[i];
            // x=getf(x), y=getf(y);
            if(getf(x)!=getf(y)) 
            {
                fa[getf(x)]=getf(y), _+=w;
                if(b[x]!=b[y]) v.push_back({b[x].first, b[x].second, b[y].first, b[y].second});
            }
        }
        if(getf(0)==getf(1)&&getf(1)==getf(2))
            if(ans.first==-1||ans.first>_) ans={_, v};
    }
    cout << ans.second.size() << "\n";
    for(auto [x, y, xx, yy] : ans.second) cout<<x<<" "<<y<<" "<<xx<<" "<<yy<<"\n";
}