import java.util.*;
class Main{
 static public void main(String[] args){
  Scanner sc=new Scanner(System.in);
   int a=sc.nextInt(),b=sc.nextInt();
   int count=0;
   for(int i=a;i<=b;i++){
    if(j(Integer.toString(i)))count++;
   }
   System.out.print(count);
   sc.close();
 }
 static boolean j(String a){
    int in=0;
    int ind=a.length()-1;
    while(in<ind){
        if(a.charAt(in++)!=a.charAt(ind--))return false;
    }
    return true;
 }
}

/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