import java.util.*;

public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int A = sc.nextInt();
    int B = sc.nextInt();
    int c =0;
    
    for(int i=A; i<B+1; i++) {
      if(String.valueOf(i).substring(0,1).equals(String.valueOf(i).substring(4, 5)) && 
        String.valueOf(i).substring(1,2).equals(String.valueOf(i).substring(3, 4))) {
      c++;
      }
    }
      
    System.out.println(c);
  }
}
/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