import java.util.*;

public class Main {
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int min = sc.nextInt();
    int max = sc.nextInt();
        
    int count = 0;
        
    for(int i=min; i<=max; i++) {
        String val = String.valueOf(i);
        String reverseVal = (new StringBuilder(val)).reverse().toString();

        if(val.equals(reverseVal)) {
        	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