#include <iostream>
using namespace std;
int main() {
  int a, b, r = 0;
  cin >> a >> b;
  for (int i = a; i <= b; i++)
    if (i % 10 == i / 10000 && i % 100 / 10 == i / 1000 % 10)
      r++;
  cout << r << 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 <iostream>
using namespace std;
int main() {
  int a, b, r = 0;
  cin >> a >> b;
  for (int i = a; i <= b; i++)
    if (i % 10 == i / 10000 && i % 100 / 10 == i / 1000 % 10)
      r++;
  cout << r << endl;
}
```