#include <bits/stdc++.h>
using namespace std;
long long n, k;
int p;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  cin >> n >> k;
  cin >> p;
  for (; p; p--) {
    long long pos;
    cin >> pos;
    if (k == 0) {
      cout << '.';
      continue;
    }
    if (n % 2 == 1 && pos == n) {
      cout << 'X';
      continue;
    }
    long long tn = n - (n % 2);
    pos = tn - pos;
    long long tk = k - (n % 2);
    if (pos % 2 == 0 && pos / 2 < tk)
      cout << 'X';
    else if (pos % 2 == 1 && pos / 2 + (n / 2) < tk)
      cout << 'X';
    else
      cout << '.';
  }
}
