import java.util.*;

public class Main {
	static boolean reverse(int n) {
      int k =n;
      int rev = 0;
      while(n!=0){
        rev = rev*10+n%10;
        n /=10;
      }
      if(k==rev){
        return true;
      }
      else{
        return false;
      }
    }
    public static void main(String[] args){
      Scanner sc = new Scanner(System.in);	
		int a = sc.nextInt();
		int b = sc.nextInt();
		int ans = 0; 
		for(int i = a; i<= b; i++) {
			if(reverse(i)) ans++; 
		}
		System.out.println(ans); 
	}
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz