Reading numbers are hard. Especially when the numbers are able to go up to ~10^5~.

This time, jsumabat is given 2 integers, ~P~ and ~Q~. jsumabat can read a given integer if the number read backwards is the same when the number is read forward.

Can you help jsumabat find out the amount of integers between ~P~ and ~Q~ that he can read?

Input Specification

The first and only line of input will contain two space-separated integers, ~P~ and ~Q~ ~(1 \le P < Q \le 10^5)~.

Output Specification

You are to output a single integer: the amount of numbers between ~P~ and ~Q~ that jsumabat can read.

Sample Input 1

90 120

Sample Output 1

3

Sample Explanation

The numbers that jsumabat can read are:

• 99
• 101
• 111