import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Main {
	static int n;
	static char[] s;

	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String[] sa = br.readLine().split(" ");
		n = Integer.parseInt(sa[0]);
		int k = Integer.parseInt(sa[1]) - 1;
		int t = Integer.parseInt(sa[2]);
		s = br.readLine().toCharArray();
		br.close();

		char res = dfs(k, t, -2);
		if (res == 'A') {
			System.out.println("Alice");
		} else {
			System.out.println("Bob");
		}
	}

	static char dfs(int k, int t, int p) {
		if (t == 0) {
			if (s[k] == 'A') {
				return 'B';
			} else {
				return 'A';
			}
		}
		char c = s[k];
		if (t % 2 == 1) {
			if (p != k - 1 && k > 0) {
				char l = s[k - 1];
				if (l != c) {
					if (k == 1 || s[k - 2] == c) {
						return c;
					}
					if (k < n - 1 || s[k + 1] == c) {
						return c;
					}
				}
				char res = dfs(k - 1, t - 1, k);
				if (res == c) {
					return c;
				}
			}
			if (p != k + 1 && k < n - 1) {
				char r = s[k + 1];
				if (r != c) {
					if (k == n - 2 || s[k + 2] == c) {
						return c;
					}
					if (k > 0 || s[k - 1] == c) {
						return c;
					}
				}
				char res = dfs(k + 1, t - 1, k);
				if (res == c) {
					return c;
				}
			}
		} else {
			if (p != k - 1 && k > 1) {
				char res = dfs(k - 1, t - 1, k);
				if (res == c) {
					return c;
				}
			}
			if (p != k + 1 && k < n - 2) {
				char res = dfs(k + 1, t - 1, k);
				if (res == c) {
					return c;
				}
			}
		}
		if (s[k] == 'A') {
			return 'B';
		} else {
			return 'A';
		}
	}
}