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

template<class T>
bool chmax(T& a, const T& b) {
    if (a < b) { a = b; return true; }
    return false;
}
template<class T>
bool chmin(T& a, const T& b) {
    if (b < a) { a = b; return true; }
    return false;
}

// std::vector Declaration
template<typename T>
vector<T> make_v(size_t a) { return vector<T>(a); }
template<typename T, typename... Ts>
auto make_v(size_t a, Ts... ts) {
    return vector<decltype(make_v<T>(ts...))>(a, make_v<T>(ts...));
}

// std::vector Declaration and Initialization
template<typename T>
vector<T> make_vector(size_t a, T x) { return vector<T>(a, x); }
template<typename T, typename U, typename... Ts>
auto make_vector(size_t a, U b, Ts... ts) {
    return vector<decltype(make_vector<T>(b,ts...))>(a, make_vector<T>(b, ts...));
}

// std::vector Input
template<typename T>
istream& operator>>(istream& is, vector<T>& v) {
    for (auto &e : v) is >> e;
    return is;
}

// std::vector Debug
template<typename T>
ostream& operator<<(ostream& os, const vector<T>& v) {
    os << "[";
    bool a = 1;
    for (auto e : v) {
        os << (a ? "" : " ");
        os << e;
        a = 0;
    }
    os << "]";
    return os;
}

// std::array Debug
template<typename T, size_t n>
ostream& operator<<(ostream& os, const array<T, n>& v) {
    os << "[";
    bool a = 1;
    for (auto e : v) {
        os << (a ? "" : " ");
        os << e;
        a = 0;
    }
    os << "]";
    return os;
}

// std::deque Debug
template<typename T>
ostream& operator<<(ostream& os, const deque<T>& d) {
    os << "[";
    bool a = 1;
    for (auto e : d) {
        os << (a ? "" : " ");
        os << e;
        a = 0;
    }
    os << "]";
    return os;
}

// std::pair Debug
template<typename T, typename U>
ostream& operator<<(ostream& os, const pair<T, U>& p) {
    os << "(" << p.first << " " << p.second << ")";
    return os;
}

// std::set Debug
template<typename T>
ostream& operator<<(ostream& os, const set<T>& st) {
    os << "{";
    bool a = 1;
    for (auto e : st) {
        os << (a ? "" : " ");
        os << e;
        a = 0;
    }
    os << "}";
    return os;
}

// std::multiset Debug
template<typename T>
ostream& operator<<(ostream& os, const multiset<T>& st) {
    os << "{";
    bool a = 1;
    for (auto e : st) {
        os << (a ? "" : " ");
        os << e;
        a = 0;
    }
    os << "}";
    return os;
}

// std::map Debug
template<typename T, typename U>
ostream& operator<<(ostream& os, const map<T, U>& mp) {
    os << "{";
    bool a = 1;
    for (auto e : mp) {
        os << (a ? "" : " ");
        os << e.first << ":" << e.second;
        a = 0;
    }
    os << "}";
    return os;
}

// std::tuple Debug
template<int N, class Tuple>
void out(ostream& os, const Tuple& t){}
template<int N, class Tuple, class H, class ...Ts>
void out(ostream& os, const Tuple& t) {
    if (N) os << " ";
    os << get<N>(t);
    out<N+1,Tuple,Ts...>(os, t);
}
template<class ...Ts>
ostream& operator<<(ostream& os, const tuple<Ts...>& t) {
    os << "(";
    out<0,tuple<Ts...>,Ts...>(os, t);
    os << ")";
    return os;
}

// Debug
#define DUMP(x) cerr<<#x<<" = "<<(x)<<endl

// Weighted edge
template<typename T>
struct edge {
    int src, to;
    T cost;

    edge() {}
    edge(int to, T cost) : src(-1), to(to), cost(cost) {}
    edge(int src, int to, T cost) : src(src), to(to), cost(cost) {}

    friend ostream& operator<<(ostream& os, const edge& e) {
        return os << "(" << e.src << "->" << e.to << ":" << e.cost << ")";
    }
};

using LL = int64_t;

#define fs first
#define sc second

const int64_t MOD = 1e9+7;

using Real = double;
Real EPS = 1e-8;

// 2-dim

using Point =  complex<Real>;
struct Segment {
    Point a, b;
    Segment() {}
    Segment(const Point& a, const Point& b) : a(a), b(b) {}
    friend ostream &operator<<(ostream &os, Segment &l) {
        return os << "[" << l.a << "," << l.b << "]";
    }
};

inline bool eq(Real a, Real b) { return abs(b - a) < EPS; }

Real radian_to_degree(Real r) {
    return r * 180.0 / M_PI;
}

Real degree_to_radian(Real d) {
    return d * M_PI / 180.0;
}

Point rotate(Real theta, const Point &p) {
    return p * polar(1., theta);
}

Real cross(const Point& a, const Point& b) {
    return a.real() * b.imag() - a.imag() * b.real();
}

Real dot(const Point& a, const Point& b) {
    return a.real() * b.real() + a.imag() * b.imag();
}

bool intersected(
        const Point& a1, const Point& b1,
        const Point& a2, const Point& b2) {
    return cross(a2-a1, b1-a1) * cross(b2-a1, b1-a1) < EPS and
           cross(b2-b1, a1-b1) * cross(a2-b1, a1-b1) < EPS;
}

bool intersected(const Segment& l1, const Segment& l2) {
    return intersected(l1.a, l1.b, l2.a, l2.b);
}

bool parallel(
        const Point &a1, const Point &b1,
        const Point &a2, const Point &b2) {
    return eq(cross(a1-b1, a2-b2), 0.);
}

bool parallel(const Segment& l1, const Segment& l2) {
    return parallel(l1.a, l1.b, l2.a, l2.b);
}

bool orthogonal(
        const Point &a1, const Point &b1,
        const Point &a2, const Point &b2) {
    return eq(dot(a1-b1, a2-b2), 0.);
}

bool orthogonal(const Segment& l1, const Segment& l2) {
    return orthogonal(l1.a, l1.b, l2.a, l2.b);
}

// https://onlinejudge.u-aizu.ac.jp/courses/library/4/CGL/1/CGL_1_A
Point projection(const Segment& l, const Point& p) {
    Real A = dot(l.b - l.a, p - l.a),
         B = dot(l.a - l.b, p - l.b);
    return (A * l.b + B * l.a) / (A + B);
}

Real distance(const Segment& l, const Point& p) {
    if (dot(l.b - l.a, p - l.a) < EPS) return abs(p - l.a);
    if (dot(l.a - l.b, p - l.b) < EPS) return abs(p - l.b);
    return abs(cross(l.b - l.a, p - l.a)) / abs(l.b - l.a);
}

Real distance(const Segment& l, const Segment& m) {
    if (intersected(l, m)) return 0.;
    return min({ distance(l, m.a), distance(l, m.b),
                 distance(m, l.a), distance(m, l.b) });
}

Point crosspoint(const Segment& l, const Segment& m) {
    Real A = cross(m.a - l.a, m.b - l.a),
         B = cross(m.a - l.b, m.b - l.b);
    return (A * l.b + B * l.a) / (A + B);
}

int main()
{
    cin.tie(0);
    ios::sync_with_stdio(false);
    cout << fixed << setprecision(10);

    double x1, y1, x2, y2;
    cin >> x1 >> y1 >> x2 >> y2;
    Segment l{Point{x1, y1}, Point{x2, y2}};
    int q; cin >> q;
    while (q--) {
        double x, y; cin >> x >> y;
        Point p{x, y};
        Point c = projection(l, p);
        Point d = p + 2. * (c - p);
        cout << d.real() << " " << d.imag() << endl;
    }

    return 0;
}



Measured memory_bytes: 3316