#include <bits/stdc++.h>
using namespace std;
int main() {
  long long n, k, p, i, d, n1, k1;
  cin >> n >> k >> p;
  n1 = n;
  k1 = k;
  if (n % 2 == 1) {
    n1 = n - 1;
    k1 = k - 1;
  }
  for (i = 0; i < p; i++) {
    cin >> d;
    if (n1 + 1 == d)
      if (k == 0)
        cout << ".";
      else
        cout << "X";
    else if (n1 >= 2 * k)
      if (d % 2 == 0 && (n1 - d) / 2 + 1 <= k1)
        cout << "X";
      else
        cout << ".";
    else if (d % 2 == 1 && (d / 2 + 1) + k1 <= n1)
      cout << ".";
    else
      cout << "X";
  }
  return 0;
}
