An integer has sequential digits if and only if each digit in the number is one more than the previous digit.

Return a sorted list of all the integers in the range `[low, high]` inclusive that have sequential digits.

Example 1:

    Input: low = 100, high = 300
    Output: [123,234]

Example 2:

    Input: low = 1000, high = 13000
    Output: [1234,2345,3456,4567,5678,6789,12345]

Constraints:

- `10 <= low <= high <= 10^9`