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.