
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        // 数値の入力
        //        int s = sc.nextInt();
        // 文字の入力
        String str = sc.next();
        boolean flg =false;
        if (str.contains("A")) {
            if (str.contains("B")) {
            	flg = true;
            }
        }
        
        if(flg) {
        	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);
        // 数値の入力
        //        int s = sc.nextInt();
        // 文字の入力
        String str = sc.next();
        boolean flg =false;
        if (str.contains("A")) {
            if (str.contains("B")) {
            	flg = true;
            }
        }
        
        if(flg) {
        	System.out.println("Yes");
        }else {
        	System.out.println("No");
        }
    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        // 数値の入力
        //        int s = sc.nextInt();
        // 文字の入力
        String str = sc.next();
        boolean flg =false;
        if (str.contains("A")) {
            if (str.contains("B")) {
            	flg = true;
            }
        }
        
        if(flg) {
        	System.out.println("Yes");
        }else {
        	System.out.println("No");
        }
    } main {
        Scanner sc = new Scanner(System.in);
        // 数値の入力
        //        int s = sc.nextInt();
        // 文字の入力
        String str = sc.next();
        boolean flg =false;
        if (str.contains("A")) {
            if (str.contains("B")) {
            	flg = true;
            }
        }
        
        if(flg) {
        	System.out.println("Yes");
        }else {
        	System.out.println("No");
        }
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String str = sc.next(); str sc.next() sc.next sc boolean flg =false; flg false if (str.contains("A")) {
            if (str.contains("B")) {
            	flg = true;
            }
        } str.contains("A") str.contains str "A" {
            if (str.contains("B")) {
            	flg = true;
            }
        } if (str.contains("B")) {
            	flg = true;
            } str.contains("B") str.contains str "B" {
            	flg = true;
            } flg = true flg true if(flg) {
        	System.out.println("Yes");
        }else {
        	System.out.println("No");
        } flg {
        	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);
        // 数値の入力
        //        int s = sc.nextInt();
        // 文字の入力
        String str = sc.next();
        boolean flg =false;
        if (str.contains("A")) {
            if (str.contains("B")) {
            	flg = true;
            }
        }
        
        if(flg) {
        	System.out.println("Yes");
        }else {
        	System.out.println("No");
        }
    }
} public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        // 数値の入力
        //        int s = sc.nextInt();
        // 文字の入力
        String str = sc.next();
        boolean flg =false;
        if (str.contains("A")) {
            if (str.contains("B")) {
            	flg = true;
            }
        }
        
        if(flg) {
        	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);
        // 数値の入力
        //        int s = sc.nextInt();
        // 文字の入力
        String str = sc.next();
        boolean flg =false;
        if (str.contains("A")) {
            if (str.contains("B")) {
            	flg = true;
            }
        }
        
        if(flg) {
        	System.out.println("Yes");
        }else {
        	System.out.println("No");
        }
    }
}
