#include <iostream>
#include <iomanip>
using namespace std;

struct Point{double x,y;};//点
struct Segment{Point p1,p2;};//線
double dot(Point a,Point b){//内積
    return a.x*b.x+a.y*b.y;
}
double cross(Point a,Point b){//外積
    return a.x*b.y-a.y*b.x;
}
double norm(Point a){
    return a.x*a.x+a.y*a.y;
}
Point project(Segment s,Point p){
    Point base,q;
    Point ans;
    base.x=s.p2.x-s.p1.x;
    base.y=s.p2.y-s.p1.y;
    q.x=p.x-s.p1.x;
    q.y=p.y-s.p1.y;
    double r=dot(q,base)/norm(base);
    ans.x=s.p1.x+base.x*r;
    ans.y=s.p1.y+base.y*r;
    return ans;
}
/*Point reflect(Segment s,Point p){
    return p+(project(s,p)-p)*2.0;
}*/

int main(void){
    int n;
    Segment a;
    Point p,ans;
    cin>>a.p1.x>>a.p1.y>>a.p2.x>>a.p2.y;
    cin>>n;
    for(int i=0;i<n;i++){
        cin>>p.x>>p.y;
        ans=project(a,p);
        cout<<fixed<<setprecision(10)<<ans.x<<" "<<ans.y<<endl;
    }
    return 0;
}

