#include <iostream>
#include <cmath>

#define NMAX 100005
#define PI 3.1415926535898
#define inf 2000005
using namespace std;

int n;
struct point {
    double x, y;

    point (double _x = 0, double _y = 0): x(_x), y(_y) {}

    inline void rot (double alpha) {
        double nx = x * cos(alpha) + y * sin(alpha);
        double ny = x * sin(alpha) - x * cos(alpha);

        x = nx;
        y = ny;
    }
} v[NMAX];

inline void upd_min (double &x, double &y) {
    if (y < x)
        x = y;
}

inline void upd_max (double &x, double &y) {
    if (y > x)
        x = y;
}

inline double dif () {
    double min_x = inf;
    double max_x = -inf;

    double min_y = inf;
    double max_y = -inf;

    for (int i = 1; i <= n; i++) {
        upd_min(min_x, v[i].x);
        upd_max(max_x, v[i].x);

        upd_min(min_y, v[i].y);
        upd_max(max_y, v[i].y);
    }

    return (max_x - min_x) - (max_y - min_y);
}

inline double f (double alpha) {
    for (int i = 1; i <= n; i++)
        v[i].rot(alpha);

    double aux = dif();
    for (int i = 1; i <= n; i++)
        v[i].rot(-alpha);

    return aux;
}

inline void print (double alpha) {
    for (int i = 1; i <= n; i++) {
        v[i].rot(alpha);
        cout << "asadar " << v[i].x << ' ' << v[i].y << endl;
    }

    double min_x = inf;
    double max_x = -inf;

    double min_y = inf;
    double max_y = -inf;

    for (int i = 1; i <= n; i++) {
        upd_min(min_x, v[i].x);
        upd_max(max_x, v[i].x);

        upd_min(min_y, v[i].y);
        upd_max(max_y, v[i].y);
    }

    cout << min_x << ' ' << max_x << ' ' << min_y << ' ' << max_y << endl;

    point p1(min_x, min_y);
    point p2(min_x, max_y);
    point p3(max_x, min_y);
    point p4(max_x, max_y);

    p1.rot(-alpha);
    p2.rot(-alpha);
    p3.rot(-alpha);
    p4.rot(-alpha);

    cout << p1.x << ' ' << p1.y << '\n';
    cout << p2.x << ' ' << p2.y << '\n';
    cout << p3.x << ' ' << p3.y << '\n';
    cout << p4.x << ' ' << p4.y << '\n';
}

int main()
{
    int t = 0;
    cin >> t;

    while (t--) {
        cin >> n;

        for (int i = 1; i <= n; i++)
            cin >> v[i].x >> v[i].y;

        double st = 0;
        double dr = PI * 0.5;
        double mijl = (st + dr) * 0.5;

        if (f(0) > 0) {
            for (int steps = 0; steps < 20; steps++) {
                if (f(mijl) < 0)
                    dr = mijl;
                else
                    st = mijl;

                mijl = (st + dr) * 0.5;
            }
        }
        else {
            for (int steps = 0; steps < 40; steps++) {
                if (f(mijl) > 0)
                    dr = mijl;
                else
                    st = mijl;

                mijl = (st + dr) * 0.5;
            }
        }

        print(0.78539816339744830961566084581988);
    }

    return 0;
}