#include <bits/stdc++.h>
using namespace std;
int main(void) {
  long long int n = 0ll, k = 0ll, p = 0ll, pn = 0ll, even = 0ll, odd = 0ll;
  while (cin >> n) {
    cin >> k >> p;
    if (k == 0) {
      for (long long int i = 0; i < p; i++) {
        cin >> pn;
        cout << ".";
      }
      cout << endl;
    } else {
      if (n % 2 == 0) {
        if (k >= (n >> 1)) {
          even = 2;
          k -= (n >> 1);
          odd = n + 1 - (k << 1);
        } else {
          odd = n + 1;
          even = n + 2 - (k << 1);
        }
        for (int i = 0; i < p; i++) {
          cin >> pn;
          if (pn % 2 == 0) {
            if (pn >= even) {
              cout << "X";
            } else {
              cout << ".";
            }
          } else {
            if (pn >= odd) {
              cout << "X";
            } else {
              cout << ".";
            }
          }
        }
        cout << endl;
      } else {
        n--;
        k--;
        if (k >= (n >> 1)) {
          even = 2;
          k -= (n >> 1);
          odd = n + 1 - (k << 1);
        } else {
          odd = n + 1;
          even = n + 2 - (k << 1);
        }
        for (int i = 0; i < p; i++) {
          cin >> pn;
          if (pn == n + 1) {
            cout << "X";
          } else if (pn % 2 == 0) {
            if (pn >= even) {
              cout << "X";
            } else {
              cout << ".";
            }
          } else {
            if (pn >= odd) {
              cout << "X";
            } else {
              cout << ".";
            }
          }
        }
        cout << endl;
      }
    }
  }
  return 0;
}
