/**
* @param {string[]} words
* @param {number} left
* @param {number} right
* @return {number}
*/
var vowelStrings = function(words, left, right) {
const vowel = 'aeiou'
let count = 0
for(let i=left; i<=right; i++) {
const word = words[i]
if(vowel.includes(word[0]) && vowel.includes(word[word.length-1])) count++
}
return count
};