#include <bits/stdc++.h>
using namespace std;
long long n, k;
int p;
long long read() {
  long long ans = 0;
  char ch = getchar();
  while (ch >= '0' && ch <= '9')
    ans = (ans << 3) + (ans << 1) + ch - '0', ch = getchar();
  return ans;
}
long long ans(long long pos) {
  long long res = 1, nn = n;
  if (n == pos) {
    return 1;
  }
  if (n & 1) {
    res++;
    nn--;
  }
  res = res + ((nn - pos) >> 1);
  return pos & 1 ? res + (nn >> 1) : res;
}
int main() {
  n = read();
  k = read();
  p = read();
  for (int i = 0; i < p; i++) {
    printf("%c", ans(read()) > k ? '.' : 'X');
  }
}
