import java.util.Scanner;

public class Main {

  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    String s = sc.next();
    sc.close();
    if (s.indexOf('A') >= 0 && s.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 sc = new Scanner(System.in);
    String s = sc.next();
    sc.close();
    if (s.indexOf('A') >= 0 && s.indexOf('B') >= 0) {
      System.out.println("Yes");
    } else {
      System.out.println("No");
    }
  }
} Main public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    String s = sc.next();
    sc.close();
    if (s.indexOf('A') >= 0 && s.indexOf('B') >= 0) {
      System.out.println("Yes");
    } else {
      System.out.println("No");
    }
  } main {
    Scanner sc = new Scanner(System.in);
    String s = sc.next();
    sc.close();
    if (s.indexOf('A') >= 0 && s.indexOf('B') >= 0) {
      System.out.println("Yes");
    } else {
      System.out.println("No");
    }
  } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String s = sc.next(); s sc.next() sc.next sc sc.close() sc.close sc if (s.indexOf('A') >= 0 && s.indexOf('B') >= 0) {
      System.out.println("Yes");
    } else {
      System.out.println("No");
    } s.indexOf('A') >= 0 && s.indexOf('B') >= 0 s.indexOf('A') >= 0 s.indexOf('A') s.indexOf s 'A' 0 s.indexOf('B') >= 0 s.indexOf('B') s.indexOf s '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 sc = new Scanner(System.in);
    String s = sc.next();
    sc.close();
    if (s.indexOf('A') >= 0 && s.indexOf('B') >= 0) {
      System.out.println("Yes");
    } else {
      System.out.println("No");
    }
  }
} public class Main {

  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    String s = sc.next();
    sc.close();
    if (s.indexOf('A') >= 0 && s.indexOf('B') >= 0) {
      System.out.println("Yes");
    } else {
      System.out.println("No");
    }
  }
} Main
import java.util.Scanner;

public class Main {

  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    String s = sc.next();
    sc.close();
    if (s.indexOf('A') >= 0 && s.indexOf('B') >= 0) {
      System.out.println("Yes");
    } else {
      System.out.println("No");
    }
  }
}