Given two strings low and high that represent two integers low and high where low <= high, return the number of strobogrammatic numbers in the range [low, high].

A strobogrammatic number is a number that looks the same when rotated 180 degrees (looked at upside down).

 

Example 1:

Input: low = "50", high = "100"
Output: 3

Example 2:

Input: low = "0", high = "0"
Output: 1

 

Constraints:

• 1 <= low.length, high.length <= 15
• low and high consist of only digits.
• low <= high
• low and high do not contain any leading zeros except for zero itself.