#include <bits/stdc++.h>
using namespace std;
const double pi = 3.141592653589793238462643383;
int main() {
  {
    int n, m, k, t;
    cin >> n >> m >> k >> t;
    set<int> s;
    ;
    for (long long i = 0; i < k; i++) {
      int a, b;
      cin >> a >> b;
      int id = (a - 1) * m + b;
      s.insert(id);
    };
    for (long long i = 0; i < t; i++) {
      int a, b;
      cin >> a >> b;
      int id = (a - 1) * m + b;
      if (s.find(id) != s.end())
        cout << "Waste" << endl;
      else {
        auto it = lower_bound(s.begin(), s.end(), id);
        int d = distance(s.begin(), it);
        int val = (id - d) % 3;
        if (val == 0)
          cout << "Grapes" << endl;
        else if (val == 1)
          cout << "Carrots" << endl;
        else
          cout << "Kiwis" << endl;
      }
    }
  }
}
