import java.util.Scanner;
public class Main{
  public static void main(String[] arsgs){
    Scanner sc = new Scanner(System.in);
    int a = sc.nextInt();
    int b = sc.nextInt();
    int count = 0;
    for (int i  = a; i <= b; i++){
      int i0 = (i/10000);
      int i1 = (i/1000)%10;
      int i3 = (i/10)%10;
      int i4 = i%10;
      if( i0 == i4){
        if ( i1 == i3){
          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