Problem:
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).

Sample Input 1

11009 11332

Sample Output 1

4

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

Sample Input 2

31415 92653

Sample Output 2

612

Solution in Ruby (2.3.3) (judge verdict: Accepted)

A, B = gets.chomp.split

a1, a2 = A[0..1], A[0..2]
b1, b2 = B[0..1], B[0..2]
a = a2.to_i
a += 1 if A > a2 + a1.reverse
b = b2.to_i
b += 1 if B >= b2 + b1.reverse
ans = b - a

puts ans