#include<cstdio>
#include<complex>
#define N 1000
typedef std::complex<double> point;
double InnerProd(point x,point y);
point Projection(point x,point y);
int main(){
        point ans,p1,p2;
        int q;
    double x1,x2,y1,y2;
        scanf("%lf%lf%lf%lf",&x1,&y1,&x2,&y2);
        p1=point(x1,y1);
        p2=point(x2,y2);
        scanf("%d",&q);
        for(int i=0;i<q;i++){
                scanf("%lf%lf",&x1,&y1);
                ans=p1+Projection(point(x1,y1)-p1,p2-p1);
                printf("%.10f %.10f\n",ans.real(),ans.imag());
        }

        return 0;
}
double InnerProd(point x,point y){
        return ((std::conj(x)*y).real());
}

/*x??????y???????°???±*/
point Projection(point x,point y){
        return (y*InnerProd(x,y)/std::norm(y));
}