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 (2.7.1) (judge verdict: Wrong Answer)

a,b = gets.strip.split.map(&:to_i)
cnt = 0 
for i in 1..9
  for k in 0..9
    for j in 0..9
      s = (i*(10**4)+k*(10**3)+j*(10**2)+k*10+j).to_i
      if s>=a && s<=b
        cnt += 1
      end
    end
  end
end
puts cnt