/* -*- coding: utf-8 -*-
 *
 * 2278.cc:  No.2278 Time Bomb Game 2 - yukicoder
 */

#include<cstdio>
#include<algorithm>
 
using namespace std;

/* constant */

const int MAX_N = 200000;

/* typedef */

/* global variables */

char s[MAX_N + 4];

/* subroutines */

bool check(int n, int t, int x, int p) {
  bool f = false;
  if (t & 1) {
    f =
      (x > 0 && ! check(n, t - 1, x - 1, p ^ 1)) ||
      (x + 1 < n && ! check(n, t - 1, x + 1, p ^ 1));
  }
  else {
    if (t == 0)
      f = (s[x] - 'A' != p);
    else {
      f =
	(s[x] - 'A' != p) &&
	(x == 1 || x == n - 1 ||
	 (x >= 2 && s[x - 2] - 'A' != p) ||
	 (x + 2 < n && s[x + 2] - 'A' != p));
    }
  }
  return f;
}

/* main */

int main() {
  int n, k, t;
  scanf("%d%d%d%s", &n, &k, &t, s);
  k--;

  if (check(n, t, k, 0)) puts("Alice");
  else puts("Bob");
  
  return 0;
}