#include<bits/stdc++.h>
using namespace std;


 
double EPS = 1e-10;
const double PI = acos(-1);
 
double add(double a, double b){
  if(abs(a+b) < EPS * (abs(a)+abs(b)))return 0;
  return a+b;
}
 
struct point{
  double x, y;
  point(){}
  point(double x,double y) : x(x) , y(y){}
 
  point operator + (point p){
    return point(add(x,p.x), add(y,p.y));
  }
 
  point operator - (point p){
    return point(add(x,-p.x), add(y,-p.y));
  }
 
  point operator * (double d){
    return point(x*d,y*d);
  }
 
  point operator / (double d){
    return point(x/d,y/d);
  }
};
 
double dot(point a, point b) {
  return (a.x * b.x + a.y * b.y);
}
 
double norm(point a){
  return sqrt(dot(a,a));
}
 
typedef point Vector;
typedef pair<point,point> Line;
 
point projection(Vector p,Vector b){
  return b*dot(p,b)/dot(b,b);
}
 
point projection(Line l,Vector p){
  point a=l.second-l.first;
  point b=p-l.first;
  return l.first+projection(b,a);
}
 
int main(void){
 
  Line l;
  point c;
  int q;
  cin >> l.first.x >> l.first.y >> l.second.x >> l.second.y;
  cin >> q;
  while(q--){
    cin >> c.x >> c.y;
    point res=projection(l,c);
    printf("%.10f %.10f\n",res.x,res.y);
  }
 
  return 0;
}