import java.util.*;
 
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int A = Integer.parseInt(sc.next());
        int B = Integer.parseInt(sc.next());
        int count = 0;
        for(int i=A; i<=B; i++) {
            int num = i;
            int a = num % 10;
            num /= 10;
            int b = num % 10;
            num /= 10;
            int c = num % 10;
            num /= 10;
            int d = num % 10;
            num /= 10;
            int e = num;
            if(a == e && b == d) 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