import java.util.Scanner; import java.util.ArrayList; import java.util.HashSet;
public class Solution { public static void main(String[] args) {
Scanner sc = new Scanner(System.in); int n = sc.nextInt(); ArrayList list = new ArrayList();
while(n > 0){ list.add(n % 10); n = n / 10; }
HashSet distinct = new HashSet<>(); HashSet repetitive = new HashSet<>(); for (int i: list) { if (distinct.contains(i)) { repetitive.add(i); } else { distinct.add(i); }
} if(repetitive.size() > 0){ System.out.println("Yes"); } else{ System.out.println("No"); }
} }