
import java.util.Scanner;

/**
 * @author yoshizaki
 *
 */
public class Main {
    public static void main(String[] args) {
        Scanner scanner= new Scanner(System.in);
        String station = scanner.nextLine();
        if (station.indexOf("A")>=0 && station.indexOf("B")>=0) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
} import java.util.Scanner; Scanner java.util public class Main {
    public static void main(String[] args) {
        Scanner scanner= new Scanner(System.in);
        String station = scanner.nextLine();
        if (station.indexOf("A")>=0 && station.indexOf("B")>=0) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
} Main public static void main(String[] args) {
        Scanner scanner= new Scanner(System.in);
        String station = scanner.nextLine();
        if (station.indexOf("A")>=0 && station.indexOf("B")>=0) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    } main {
        Scanner scanner= new Scanner(System.in);
        String station = scanner.nextLine();
        if (station.indexOf("A")>=0 && station.indexOf("B")>=0) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    } Scanner scanner= new Scanner(System.in); scanner new Scanner(System.in) String station = scanner.nextLine(); station scanner.nextLine() scanner.nextLine scanner if (station.indexOf("A")>=0 && station.indexOf("B")>=0) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        } station.indexOf("A")>=0 && station.indexOf("B")>=0 station.indexOf("A")>=0 station.indexOf("A") station.indexOf station "A" 0 station.indexOf("B")>=0 station.indexOf("B") station.indexOf station "B" 0 {
            System.out.println("Yes");
        } System.out.println("Yes") System.out.println System.out System System.out "Yes" {
            System.out.println("No");
        } System.out.println("No") System.out.println System.out System System.out "No" String[] args args public class Main {
    public static void main(String[] args) {
        Scanner scanner= new Scanner(System.in);
        String station = scanner.nextLine();
        if (station.indexOf("A")>=0 && station.indexOf("B")>=0) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
} public class Main {
    public static void main(String[] args) {
        Scanner scanner= new Scanner(System.in);
        String station = scanner.nextLine();
        if (station.indexOf("A")>=0 && station.indexOf("B")>=0) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
} Main

import java.util.Scanner;

/**
 * @author yoshizaki
 *
 */
public class Main {
    public static void main(String[] args) {
        Scanner scanner= new Scanner(System.in);
        String station = scanner.nextLine();
        if (station.indexOf("A")>=0 && station.indexOf("B")>=0) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
}
