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class Solution {
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  boolean isVowel(char ch) {
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    return ch == 'a' || ch == 'e' || ch == 'i' || ch == 'o' || ch == 'u';
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  }
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  public long countVowels(String word) {
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    long count = 0;
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    int len = word.length();
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    for (int pos = 0; pos < len; pos++) {
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      if (isVowel(word.charAt(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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}