1
var beautySum = function (s) {
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  const len = s.length;
3

4
  let ans = 0;
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  const freq = new Array(26).fill(0);
6

7
  for (let i = 0; i < len; i++) {
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    freq[s[i].charCodeAt(0) - "a".charCodeAt(0)]++;
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    for (let j = i + 1; j < len; j++) {
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      freq[s[j].charCodeAt(0) - "a".charCodeAt(0)]++;
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      ans += minMaxDiff(freq);
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    }
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    freq.fill(0);
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  }
15

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  function minMaxDiff(freq) {
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    freq = freq.filter((f) => f != 0);
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    return Math.max(...freq) - Math.min(...freq);
19
  }
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  return ans;
22
};