Please solve the programming task below using a self-contained code snippet in a markdown code block.

You are given a 0-indexed array of string words and two integers left and right.
A string is called a vowel string if it starts with a vowel character and ends with a vowel character where vowel characters are 'a', 'e', 'i', 'o', and 'u'.
Return the number of vowel strings words[i] where i belongs to the inclusive range [left, right].
 
Please complete the following python code precisely:
```python
class Solution:
    def vowelStrings(self, words: List[str], left: int, right: int) -> int:
```