#include<bits/stdc++.h>
typedef long long int ll;
typedef unsigned long long int ull;
#define BIG_NUM 2000000000
#define HUGE_NUM 1000000000000000000
#define MOD 1000000007
#define EPS 0.000000001
using namespace std;



struct Point{
    Point(double arg_x,double arg_y){
        x = arg_x;
        y = arg_y;
    }

    Point(){
        x = y = 0.0;
    }

    Point operator + (Point p){ return Point(x+p.x,y+p.y); }
    Point operator - (Point p){ return Point(x-p.x,y-p.y);}
    Point operator * (double a){ return Point(a*x,a*y); }
    Point operator / (double a){ return Point(x/a,y/a); }

    double abs(){ return sqrt(norm()); }
    double norm(){ return x*x + y*y; }

    bool operator<(const Point &p) const{
        return x != p.x? x < p.x: y < p.y;
    }

    bool operator == (const Point &p) const{
        return fabs(x-p.x) < EPS && fabs(y-p.y) < EPS;
    }

    /*
    void debug(){

        printf("(%.3lf,%.3lf)\n",x,y);
    }*/

    double x,y;
};

typedef Point Vector;
typedef vector<Point> Polygon;

struct Line{
    Line(){

    }
    Line(Point a,Point b){
        p[0] = a;
        p[1] = b;
    }
    /*void outPut(){

        printf("(%.3lf,%.3lf)-(%.3lf,%.3lf)\n",p[0].x,p[0].y,p[1].x,p[1].y);
    }*/
    Point p[2];
};


double norm(Vector a){
    return a.x*a.x+a.y*a.y;
}

double abs(Vector a){
    return sqrt(norm(a));
}

double dot(Vector a,Vector b){
    return a.x*b.x + a.y*b.y;
}

double cross(Vector a,Vector b){
    return a.x*b.y-a.y*b.x;
}

Point project(Line l,Point p){

    Vector base = l.p[1]-l.p[0];
    double r = dot(p-l.p[0],base)/norm(base);
    return l.p[0]+base*r;
}

int main(){

    Line base_line;
    scanf("%lf %lf %lf %lf",&base_line.p[0].x,&base_line.p[0].y,&base_line.p[1].x,&base_line.p[1].y);

    Point tmp_p;
    int num_query;
    scanf("%d",&num_query);

    for(int loop = 0; loop < num_query; loop++){

        scanf("%lf %lf",&tmp_p.x,&tmp_p.y);

        Point proj_p = project(base_line,tmp_p);
        printf("%.10lf %.10lf\n",proj_p.x,proj_p.y);
    }

    return 0;
}