#include<bits/stdc++.h>
using namespace std;
#define int long long
const int inf=1e18;
void subtask2(int n, vector<pair<pair<int,int>, pair<int,int> > >& p){
sort(p.begin(), p.end());
pair<int,int> last={-inf, -inf};
for(int i=0; i<n; i++){
auto a=p[i].first;
auto b=p[i].second;
if(last.first!=-inf){
cout << last.first << " " << last.second << " " << a.first << " " << a.second << "\n";
}
last=b;
}
}
signed main(){
ios_base::sync_with_stdio(false);
cin.tie(0);
int n;
cin >> n;
vector<pair<pair<int,int>, pair<int,int> > >p(n);
for(int i=0; i<n; i++){
cin >> p[i].first.first >> p[i].first.second;
cin >> p[i].second.first >> p[i].second.second;
if(p[i].first>p[i].second){
swap(p[i].first, p[i].second);
}
}
subtask2(n, p);
}
