Score : $200$ points

Problem Statement

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).

11009 11332

4

There are four integers that satisfy the conditions: $11011$, $11111$, $11211$ and $11311$.

31415 92653

612