import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        char[] ch = s.toCharArray();
        Set<Character> hs = new HashSet<>();
        for (char c : ch)
            hs.add(c);
        if (hs.size() >= 2) {
            System.out.println("Yes");
        } else {
            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 s = sc.next();
        char[] ch = s.toCharArray();
        Set<Character> hs = new HashSet<>();
        for (char c : ch)
            hs.add(c);
        if (hs.size() >= 2) {
            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();
        char[] ch = s.toCharArray();
        Set<Character> hs = new HashSet<>();
        for (char c : ch)
            hs.add(c);
        if (hs.size() >= 2) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    } main {
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        char[] ch = s.toCharArray();
        Set<Character> hs = new HashSet<>();
        for (char c : ch)
            hs.add(c);
        if (hs.size() >= 2) {
            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 char[] ch = s.toCharArray(); ch s.toCharArray() s.toCharArray s Set<Character> hs = new HashSet<>(); hs new HashSet<>() for (char c : ch)
            hs.add(c); char c ch hs.add(c); hs.add(c) hs.add hs c if (hs.size() >= 2) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        } hs.size() >= 2 hs.size() hs.size hs 2 {
            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();
        char[] ch = s.toCharArray();
        Set<Character> hs = new HashSet<>();
        for (char c : ch)
            hs.add(c);
        if (hs.size() >= 2) {
            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();
        char[] ch = s.toCharArray();
        Set<Character> hs = new HashSet<>();
        for (char c : ch)
            hs.add(c);
        if (hs.size() >= 2) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
} Main
import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        char[] ch = s.toCharArray();
        Set<Character> hs = new HashSet<>();
        for (char c : ch)
            hs.add(c);
        if (hs.size() >= 2) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
}