class Solution {
public:

    bool isVowel(char c){
        if(c=='u'||c=='U'){
            return true;
        }else if(c=='o'||c=='O'){
            return true;
        }else if(c=='a'||c=='A'){
            return true;
        }else if(c=='e'||c=='E'){
            return true;
        }else if(c=='i'||c=='I'){
            return true;
        }else{
            return false;
        }
    }

    string reverseVowels(string s) {
        vector<char> vowel;

        for(char c:s){
            if(isVowel(c)){
                vowel.push_back(c);
            }
        }
        reverse(vowel.begin(),vowel.end());
        string ans;
        int ind=0;

        for(char c:s){
            if(isVowel(c)){
                ans=ans+vowel[ind];
                ind++;
            }else{
                ans=ans+c;
            }
        }

        return ans;
    }
};