class Solution {
public:
    bool halvesAreAlike(string s) {
        string a = s.substr(0,s.size()/2);
        string b = s.substr(s.size()/2);
        string h = "aeiouAEIOU";
        int sum1 = 0;
        int sum2 = 0;

        for(auto& ch : a)
        {
            if(h.find_first_of(ch) != string::npos)
                sum1++;
        }

        for(auto& ch : b)
        {
            if(h.find_first_of(ch) != string::npos)
                sum2++;
        }

        return sum1 == sum2;
    }
};