#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
struct P
{
P(){};
P(ll _x,ll _y){x = _x; y = _y;};
ll x,y;
P operator +(const P & oth){return P(x+oth.x,y+oth.y);};
P operator -(const P & oth){return P(x-oth.x,y-oth.y);};
};
P vs;
ll crs(P a,P b){return a.x*b.y - a.y*b.x;};
ll dot(P a,P b){return a.x*b.x + a.y*b.y;};
bool cmp(P a,P b)
{
return (crs(vs,b-a) != 0 ? crs(vs,b-a) > 0 : ((vs.x != 0 ? a.x < b.x : a.y < b.y)));
}
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(0);
int n;
cin >> n;
vector<P> x;
for(int i = 0;i < n;++i)
{
P a,b;
cin >> a.x >> a.y >> b.x >> b.y;
if(i == 0)
vs = b-a;
x.push_back(a);
x.push_back(b);
}
sort(x.begin(),x.end(),cmp);
for(int i = 1;i+1 < x.size();i += 2)
{
cout << x[i].x << ' ' << x[i].y << ' ' << x[i+1].x << ' ' << x[i+1].y << "\n";
}
return 0;
}
