import java.util.Arrays;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        String s = scan.next();
        char[] cs = s.toCharArray();
        Arrays.sort(cs);
        if (cs[0] == cs[2]) {
            System.out.println("No");
        } else {
            System.out.println("Yes");
        }
    }
} import java.util.Arrays; Arrays java.util import java.util.Scanner; Scanner java.util public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        String s = scan.next();
        char[] cs = s.toCharArray();
        Arrays.sort(cs);
        if (cs[0] == cs[2]) {
            System.out.println("No");
        } else {
            System.out.println("Yes");
        }
    }
} Main public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        String s = scan.next();
        char[] cs = s.toCharArray();
        Arrays.sort(cs);
        if (cs[0] == cs[2]) {
            System.out.println("No");
        } else {
            System.out.println("Yes");
        }
    } main {
        Scanner scan = new Scanner(System.in);
        String s = scan.next();
        char[] cs = s.toCharArray();
        Arrays.sort(cs);
        if (cs[0] == cs[2]) {
            System.out.println("No");
        } else {
            System.out.println("Yes");
        }
    } Scanner scan = new Scanner(System.in); scan new Scanner(System.in) String s = scan.next(); s scan.next() scan.next scan char[] cs = s.toCharArray(); cs s.toCharArray() s.toCharArray s Arrays.sort(cs) Arrays.sort Arrays cs if (cs[0] == cs[2]) {
            System.out.println("No");
        } else {
            System.out.println("Yes");
        } cs[0] == cs[2] cs[0] cs 0 cs[2] cs 2 {
            System.out.println("No");
        } System.out.println("No") System.out.println System.out System System.out "No" {
            System.out.println("Yes");
        } System.out.println("Yes") System.out.println System.out System System.out "Yes" String[] args args public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        String s = scan.next();
        char[] cs = s.toCharArray();
        Arrays.sort(cs);
        if (cs[0] == cs[2]) {
            System.out.println("No");
        } else {
            System.out.println("Yes");
        }
    }
} public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        String s = scan.next();
        char[] cs = s.toCharArray();
        Arrays.sort(cs);
        if (cs[0] == cs[2]) {
            System.out.println("No");
        } else {
            System.out.println("Yes");
        }
    }
} Main
import java.util.Arrays;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        String s = scan.next();
        char[] cs = s.toCharArray();
        Arrays.sort(cs);
        if (cs[0] == cs[2]) {
            System.out.println("No");
        } else {
            System.out.println("Yes");
        }
    }
}
