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

Please create a solution in Cpp 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,i,c=0;cin>>A>>B;for(i=A;i<=B;i++)if(i/10000==i%10 && i/1000%10==i/10%10)c++;cout<<c<<endl;}
```