import java.util.*;

class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int A = sc.nextInt();
        int B = sc.nextInt();
        int count = 0;
        for(int i = A; i <= B; i++) {
            String tmp = String.valueOf(i);
            boolean ok = true;
            for(int j = 0; j < tmp.length() / 2; j++) {
                if(tmp.charAt(j) != tmp.charAt(tmp.length() - j - 1)) {
                    ok = false;
                    break;
                }
            }
            if(ok) 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