#include <bits/stdc++.h>
using namespace std;
long long n, k, pos, xxx;
int p;
void work() {
  long long rem = n - k, ned = k << 1;
  if (ned <= n) {
    if (k && (rem & 1) != (k & 1)) {
      n -= 1LL;
      k -= 1LL;
      ned = k << 1;
    }
    pos = n - ned + 1LL;
    xxx = n + 1LL;
  } else {
    ned = rem << 1;
    xxx = ned + 1LL;
    pos = 1LL;
  }
  for (int i = 0; i < p; i++) {
    long long x;
    cin >> x;
    if (x >= xxx || (x >= pos && ((x - pos) & 1)))
      printf("X");
    else
      printf(".");
  }
}
int main() {
  cin >> n >> k >> p;
  work();
  return 0;
}
