import java.util.Scanner;
import java.util.Arrays;
public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int A = sc.nextInt();
        int B = sc.nextInt();
        int[] ans = new int[5];
        int count = 0;
        for(int i = A;i <= B;i++){
            int j = 0;
            int x = i;
            while(x > 0){
                ans[j++] = x % 10;
                x /= 10;
                //System.out.println("i = " + x);
                //System.out.println("ans[] = " + ans[j]);
            }
            if(ans[0] == ans[4] && ans[1] == ans[3]){
                count++;
            }
        }
        System.out.println(count);
    }
}

/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