// editor2

import java.util.Scanner;
public class SymmetricIntegers{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        
        int l=sc.nextInt();
        int h=sc.nextInt();
        int count=0;
        
        if(l<0 || h<0 ){
            System.out.println("Invalid input");
            return;
        }
        
        for(int i=l;i<h;i++){
            if(i>=11 && i<=99){
               int once = i%10;
               int tence =i/10;
               if(once==tence){
                   count++;
               }
            }
            
            if(i>=1010 && i<=9999){
                String n=String.valueOf(i);
                String fh=n.substring(0,2);
                String fh=n.substring(2);
            }
        }
        
        System.out.println(count);
        
    }
}