#include<iostream>
using namespace std;

int main()
{
	int a,b;
	cin>>a>>b;
	
	int v=0;
	for(int i=a;i<=b;i++){
		if(i/10000==i%10&&i%10000/1000==i%100/10) v++;
	}
	
	cout<<v<<endl;
	
	return 0;
}

### 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<iostream>
using namespace std;

int main()
{
	int a,b;
	cin>>a>>b;
	
	int v=0;
	for(int i=a;i<=b;i++){
		if(i/10000==i%10&&i%10000/1000==i%100/10) v++;
	}
	
	cout<<v<<endl;
	
	return 0;
}

```