2586. Count the Number of Vowel Strings in

class Solution {
public:
      int isvowel(char c)
      {
         return c=='a' || c=='e' || c=='i' || c=='o' || c=='u';
      }
    int vowelStrings(vector<string>& words, int left, int right) {
       int ans=0; 
       for(int i=left; i<=right; i++)
       {
           if(isvowel(words[i][0]) && isvowel(words[i][words[i].size()-1]))
           ans++;
       }
       return ans;
    }
};