#include <bits/stdc++.h>
using namespace std;
long long n;
long long k, p;
int main() {
  scanf("%lld", &n);
  scanf("%lld", &k);
  scanf("%lld", &p);
  long long x = n - k;
  long long y = k;
  long long z = x - y;
  long long q;
  if (x <= y) {
    z = x;
    z = z * 2;
    while (p--) {
      scanf("%lld", &q);
      if (q <= z) {
        if (q % 2 == 1)
          cout << ".";
        else
          cout << "X";
      } else
        cout << "X";
    }
  } else {
    if ((x / 2) <= (z - z / 2)) {
      while (p--) {
        scanf("%lld", &q);
        if (q <= x)
          cout << ".";
        else
          cout << "X";
      }
    } else {
      if (z % 2 == 0) {
        while (p--) {
          scanf("%lld", &q);
          if (q <= z) {
            cout << ".";
          } else {
            q -= z;
            if (q % 2 == 1)
              cout << ".";
            else
              cout << "X";
          }
        }
      } else {
        while (p--) {
          scanf("%lld", &q);
          if (q <= z + 1) {
            cout << ".";
          } else if (q >= n - 1) {
            cout << "X";
          } else {
            q -= (z + 1);
            if (q % 2 == 1)
              cout << ".";
            else
              cout << "X";
          }
        }
      }
    }
  }
}
