Count the Number of Vowel Strings in Range
You are given a 0-indexed array of string words and two integers left and right.
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].
Example 1
Input: words = ["are","amy","u"], left = 0, right = 2
Output: 2
Explanation: - "are" is a vowel string because it starts with 'a' and ends with 'e'. - "amy" is not a vowel string because it does not end with a vowel. - "u" is a vowel string because it starts with 'u' and ends with 'u'. The number of vowel strings in the mentioned range is 2.
Example 2
Input: words = ["hey","aeo","mu","ooo","artro"], left = 1, right = 4
Output: 3
Explanation: - "aeo" is a vowel string because it starts with 'a' and ends with 'o'. - "mu" is not a vowel string because it does not start with a vowel. - "ooo" is a vowel string because it starts with 'o' and ends with 'o'. - "artro" is a vowel string because it starts with 'a' and ends with 'o'. The number of vowel strings in the mentioned range is 3.
Constraints
- 1 <= words.length <= 1000
- 1 <= words[i].length <= 10
- words[i] consists of only lowercase English letters.
- 0 <= left <= right < words.length
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