#include<bits/stdc++.h>
using namespace std;
int main(){
  int A,B,ans;
  cin>>A>>B;
  ans=0;
  for (int i=A;i<=B;i++){
    if (i/10000==i%10 && (i/1000)%10==(i/10)%10)
      ans+=1;
  }
  cout<<ans<<endl;
}

      

### Prompt

Your task is to create a Cpp solution to the following problem:

Find the number of palindromic numbers among the integers between A and B (inclusive). Here, a palindromic number is a positive integer whose string representation in base 10 (without leading zeros) reads the same forward and backward.

Constraints

* 10000 \leq A \leq B \leq 99999
* All input values are integers.

Input

Input is given from Standard Input in the following format:


A B


Output

Print the number of palindromic numbers among the integers between A and B (inclusive).

Examples

Input

11009 11332


Output

4


Input

31415 92653


Output

612

### Response

```cpp
#include<bits/stdc++.h>
using namespace std;
int main(){
  int A,B,ans;
  cin>>A>>B;
  ans=0;
  for (int i=A;i<=B;i++){
    if (i/10000==i%10 && (i/1000)%10==(i/10)%10)
      ans+=1;
  }
  cout<<ans<<endl;
}

      

```