#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;
    sort(a.begin(), a.end());
    pair<long long, vector<tuple<int,int,int,int>>> ans={-1, vector<tuple<int,int,int,int>>()};
    do
    {
        long long _ = 0;
        vector<tuple<int,int,int,int>> v;
        for(int i=0;i<2;++i)
        {
            _ += abs(a[i+1].first - a[i].first);
            _ += abs(a[i+1].second - a[i].second);
            if(a[i+1].first != a[i].first) v.push_back({a[i].first, a[i].second, a[i+1].first, a[i].second});
            if(a[i+1].second != a[i].second) v.push_back({a[i+1].first, a[i].second, a[i+1].first, a[i+1].second});
        }
        if(ans.first==-1||ans.first>_) ans={_, v};
    } while (next_permutation(a.begin(), a.end()));
    cout << ans.second.size() << "\n";
    for(auto [x, y, xx, yy] : ans.second) cout<<x<<" "<<y<<" "<<xx<<" "<<yy<<"\n";

}