import java.util.*;
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String a = sc.next();
        for(int i = 0; i<a.length()-1; i++){
            if(a.charAt(i) != a.charAt(i+1)){
                System.out.println("Yes");
                return;
            }
        }
        System.out.println("No");
    }
} import java.util.*; util.* java public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String a = sc.next();
        for(int i = 0; i<a.length()-1; i++){
            if(a.charAt(i) != a.charAt(i+1)){
                System.out.println("Yes");
                return;
            }
        }
        System.out.println("No");
    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String a = sc.next();
        for(int i = 0; i<a.length()-1; i++){
            if(a.charAt(i) != a.charAt(i+1)){
                System.out.println("Yes");
                return;
            }
        }
        System.out.println("No");
    } main {
        Scanner sc = new Scanner(System.in);
        String a = sc.next();
        for(int i = 0; i<a.length()-1; i++){
            if(a.charAt(i) != a.charAt(i+1)){
                System.out.println("Yes");
                return;
            }
        }
        System.out.println("No");
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String a = sc.next(); a sc.next() sc.next sc for(int i = 0; i<a.length()-1; i++){
            if(a.charAt(i) != a.charAt(i+1)){
                System.out.println("Yes");
                return;
            }
        } int i = 0; int i = 0; i 0 i<a.length()-1 i a.length()-1 a.length() a.length a 1 i++ i++ i {
            if(a.charAt(i) != a.charAt(i+1)){
                System.out.println("Yes");
                return;
            }
        } {
            if(a.charAt(i) != a.charAt(i+1)){
                System.out.println("Yes");
                return;
            }
        } if(a.charAt(i) != a.charAt(i+1)){
                System.out.println("Yes");
                return;
            } a.charAt(i) != a.charAt(i+1) a.charAt(i) a.charAt a i a.charAt(i+1) a.charAt a i+1 i 1 {
                System.out.println("Yes");
                return;
            } System.out.println("Yes") System.out.println System.out System System.out "Yes" return; 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 a = sc.next();
        for(int i = 0; i<a.length()-1; i++){
            if(a.charAt(i) != a.charAt(i+1)){
                System.out.println("Yes");
                return;
            }
        }
        System.out.println("No");
    }
} public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String a = sc.next();
        for(int i = 0; i<a.length()-1; i++){
            if(a.charAt(i) != a.charAt(i+1)){
                System.out.println("Yes");
                return;
            }
        }
        System.out.println("No");
    }
} Main
import java.util.*;
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String a = sc.next();
        for(int i = 0; i<a.length()-1; i++){
            if(a.charAt(i) != a.charAt(i+1)){
                System.out.println("Yes");
                return;
            }
        }
        System.out.println("No");
    }
}