#include <bits/stdc++.h>
using namespace std;
int main() {
  long long int n, k, p;
  long long int req[1009];
  cin >> n >> k >> p;
  for (int i = 0; i < p; i++) cin >> req[i];
  if (n % 2 == 0 && n / 2 == k) {
    for (int i = 0; i < p; i++) {
      if (req[i] % 2)
        cout << ".";
      else
        cout << "X";
    }
    goto finish;
  }
  if (k > n / 2) {
    for (int i = 0; i < p; i++) {
      if (req[i] % 2 && req[i] <= (n - k) * 2) {
        cout << ".";
        continue;
      }
      if (req[i] % 2 == 0 && req[i] <= (n - k) * 2) {
        cout << "X";
        continue;
      }
      cout << "X";
    }
    goto finish;
  }
  if (k < (n + 1) / 2) {
    if (n % 2 == 0) {
      for (int i = 0; i < p; i++) {
        if (req[i] <= n - 2 * k) {
          cout << ".";
          continue;
        }
        if (req[i] % 2 == 0) {
          cout << "X";
          continue;
        }
        cout << ".";
      }
      goto finish;
    }
    if (k == 0) {
      for (int i = 0; i < p; i++) {
        cout << ".";
      }
      goto finish;
    }
    if (k == 1) {
      for (int i = 0; i < p; i++) {
        if (req[i] != n) {
          cout << ".";
          continue;
        }
        cout << "X";
      }
      goto finish;
    }
    for (int i = 0; i < p; i++) {
      if (req[i] >= n - 1) {
        cout << "X";
        continue;
      }
      if (req[i] < (n - 1) - (k - 2) * 2) {
        cout << ".";
        continue;
      }
      if (req[i] % 2) {
        cout << ".";
        continue;
      }
      cout << "X";
    }
    goto finish;
  }
finish:;
}
