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class Solution {
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 public:
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  bool isVowel(char ch) {
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    return ch == 'a' or ch == 'e' or ch == 'i' or ch == 'o' or ch == 'u';
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  }
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  long long countVowels(string word) {
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    long long count = 0;
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    int len = word.size();
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    for (int pos = 0; pos < len; pos++) {
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      if (isVowel(word[pos])) {
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        count += (long)(len - pos) * (long)(pos + 1);
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      }
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    }
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    return count;
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  }
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};