text: #include <bits/stdc++.h>
  using namespace std;
  using ll = long long;
  // --------------------------------------------------------
  template<class T> bool chmax(T& a, const T b) { if (a < b) { a = b; return 1; } return 0; }
  template<class T> bool chmin(T& a, const T b) { if (b < a) { a = b; return 1; } return 0; }
  #define FOR(i,l,r) for (int i = (l); i < (r); ++i)
  #define RFOR(i,l,r) for (int i = (r)-1; (l) <= i; --i)
  #define REP(i,n) FOR(i,0,n)
  #define RREP(i,n) RFOR(i,0,n)
  #define ALL(c) (c).begin(), (c).end()
  #define RALL(c) (c).rbegin(), (c).rend()
  #define SORT(c) sort(ALL(c))
  #define RSORT(c) sort(RALL(c))
  #define MIN(c) *min_element(ALL(c))
  #define MAX(c) *max_element(ALL(c))
  #define SUM(c) accumulate(ALL(c), 0)
  #define SUMLL(c) accumulate(ALL(c), 0LL)
  #define SZ(c) ((int)(c).size())
  #define CIN(c) cin >> (c)
  #define COUT(c) cout << (c) << '\n'
  #define debug(x) cerr << #x << " = " << (x) << '\n';
  using P = pair<int,int>;
  using VP = vector<P>;
  using VVP = vector<VP>;
  using VS = vector<string>;
  using VI = vector<int>;
  using VVI = vector<VI>;
  using VLL = vector<ll>;
  using VVLL = vector<VLL>;
  using VB = vector<bool>;
  using VVB = vector<VB>;
  using VD = vector<double>;
  using VVD = vector<VD>;
  static const double EPS = 1e-10;
  static const double PI  = acos(-1.0);
  static const ll MOD = 1000000007;
  // static const ll MOD = 998244353;
  static const int INF = (1 << 30) - 1;  // 1073741824 - 1
  // static const ll INF = (1LL << 62) - 1;  // 4611686018427387904 - 1
  // --------------------------------------------------------
  // #include <atcoder/all>
  // using namespace atcoder;
  
  #include "geom.cpp"
  
  
  int main() {
      ios::sync_with_stdio(false);
      cin.tie(0);
      cout << fixed << setprecision(15);
  
      Line l; cin >> l.p1.x >> l.p1.y >> l.p2.x >> l.p2.y;
      int Q; cin >> Q;
      REP(_, Q) {
          Point p; cin >> p.x >> p.y;
          auto q = projection(l, p);
          cout << q.x << " " << q.y << '\n';
      }
  
      return 0;
  }
  // Verify: http://judge.u-aizu.ac.jp/onlinejudge/description.jsp?id=CGL_1_A&lang=ja
  