#include <iostream>
#include <cmath>
#include <algorithm>
#include <vector>
#include <string>
#include <iomanip>
#include <fstream>
#include <map>

using namespace std;

struct Point
{
    double x;
    double y;
};

struct Vector
{
    Point b;
    Point e;
};

inline double Cross(Vector p, Point T)
{
    return (p.e.x - p.b.x)*(T.y - p.b.y) - (p.e.y - p.b.y)*(T.x - p.b.x);
}

int main()
{
    ofstream fout("output.txt");
    ifstream fin("input.txt");
    int N, M;

    fin >> N >> M;
    vector<Point> points(N);
    vector<Vector> vectors(M);
    for(int i = 0; i < N; ++i) fin >> points[i].x >> points[i].y;
    for(int i = 0; i < M; ++i) fin >> vectors[i].b.x >> vectors[i].b.y >> vectors[i].e.x >> vectors[i].e.y;

    for(int i = 0; i < M; ++i)
    {
        double A = vectors[i].e.y - vectors[i].b.y;
        double B = -(vectors[i].e.x - vectors[i].b.x);
        double C = vectors[i].b.y*(-B) - vectors[i].b.x*A;

        for(int j = 0; j < N; ++j)
        {
            if(Cross(vectors[i], points[j]) <= 0)
            {
                Point N;
                double A2 = B;
                double B2 = -A;
                double C2 = A*points[j].y - B*points[j].x;

                double My = (-A*C2+A2*C)/(B2*A-B*A2);
                double Mx = -(C+B*My)/A;

                N.x = 2*Mx - points[j].x;
                N.y = 2*My - points[j].y;

                points[j] = N;
            }

        }
    }
    for(int i = 0; i < N; ++i) fout << fixed << setprecision(10) << points[i].x << " " << points[i].y << endl;

    return 0;
}