#include <algorithm>
#include <array>
#include <assert.h>
#include <bitset>
#include <chrono>
#include <cmath>
#include <complex>
#include <cstring>
#include <functional>
#include <fstream>
#include <iomanip>
#include <iostream>
#include <istream>

#include <map>
#include <math.h>
#include <numeric>
#include <ostream>
#include <queue>
#include <set>
#include <stack>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <vector>

namespace asl
{
    
    template <typename numeric_type>
    class point
    {
    public:
        numeric_type x, y;

        point(numeric_type x = 0, numeric_type y = 0) : x(x), y(y) {}

        point<numeric_type> &operator+=(const point<numeric_type> &ri)
        {
            x += ri.x;
            y += ri.y;
            return *this;
        }

        point<numeric_type> &operator-=(const point<numeric_type> &ri)
        {
            x -= ri.x;
            y -= ri.y;
            return *this;
        }

        point<numeric_type> &operator*=(const point<numeric_type> &ri)
        {
            auto _x = x * ri.x - y * ri.y;
            auto _y = x * ri.y + y * ri.x;
            x = _x;
            y = _y;
            return *this;
        }

        friend point<numeric_type> operator+(const point<numeric_type> &a, const point<numeric_type> &b)
        {
            return point<numeric_type>(a) += b;
        }

        friend point<numeric_type> operator-(const point<numeric_type> &a, const point<numeric_type> &b)
        {
            return point<numeric_type>(a) -= b;
        }

        friend point<numeric_type> operator*(const point<numeric_type> &a, const point<numeric_type> &b)
        {
            return point<numeric_type>(a) *= b;
        }

    };

    template <typename numeric_type>
    std::istream &operator>>(std::istream &is, point<numeric_type> &p)
    {
        return is >> p.x >> p.y;
    }

    template <typename numeric_type>
    numeric_type norm(point<numeric_type> a)
    {
        return a.x * a.x + a.y * a.y;
    }

    template <typename numeric_type>
    class line
    {
    public:
        point<numeric_type> p, q;

    };

    template <typename numeric_type>
    std::istream &operator>>(std::istream &is, line<numeric_type> &l)
    {
        return is >> l.p >> l.q;
    }

    template <typename numeric_type>
    numeric_type dot(point<numeric_type> a, point<numeric_type> b)
    {
        return a.x * b.x + a.y * b.y;
    }

} 

#include <stdint.h>

#include <experimental/optional>

namespace asl
{
    
    template <typename numeric_type>
    point<numeric_type> projection(const line<numeric_type> &l, const point<numeric_type> &p)
    {
        double t = dot(p - l.p, l.p - l.q) / norm(l.p - l.q);
        return l.p + t * (l.p - l.q);
    }

} 
 
#include <random>

#define endl '\n'

using namespace asl;
using namespace std;

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    line<double> l;

    cin >> l;

    int n;
    cin >> n;

    cout.precision(10);
    cout << fixed;

    while (n--)
    {
        point<double> p;
        cin >> p;

        auto q = projection(l, p);
        cout << q.x << " " << q.y << endl;
    }

    return 0;
}





Measured memory_bytes: 3304