#include <bits/stdc++.h>
using namespace std;
unsigned long long int n, k, p;
unsigned long long int x, on, ok;
int main() {
  cin >> n >> k >> p;
  on = n;
  ok = k;
  for (unsigned long long int i = 0; i < p; i++) {
    n = on;
    k = ok;
    cin >> x;
    x--;
    x = n - 1 - x;
    on = n;
    ok = k;
  par:;
    if (k == 0) {
      printf(".");
      continue;
    }
    if ((n & 1ll) == 0) {
      if ((x & 1ll) == 0) {
        unsigned long long int qts = x / 2ll + 1ll;
        if (k >= qts)
          printf("X");
        else
          printf(".");
      } else {
        unsigned long long int qts = n / 2ll + (x + 1ll) / 2;
        if (k >= qts)
          printf("X");
        else
          printf(".");
      }
    } else {
      if (x == 0) {
        printf("X");
      } else {
        k--;
        n--;
        x--;
        goto par;
      }
    }
  }
  printf("\n");
  return 0;
}
