import java.util.Scanner;
public 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++){
    	int a = i / 10000;
        int b = i % 10;
        if(a != b) continue;
      	a = (i / 1000)% 10;
        b = (i / 10) % 10;
        if(a == b) 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