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  nguyentaiphu142857 • 9:53 a.m. 10 Tháng 1, 2021 •

  include <bits/stdc++.h>

  using namespace std;
  int main()
  {
  string s;
  cin >> s;
  int a[s.size()],b[s.size()];
  a[0]=0;b[0]=0;
  if (s[0]=='a'||s[0]=='e'||s[0]=='i'||s[0]=='o'||s[0]=='u') a[0]++;
  else b[0]++;
  for (int i=1;i<s.size();i++)
  {
  a[i]=a[i-1];
  b[i]=b[i-1];
  if (s[i]=='a'||s[i]=='e'||s[i]=='i'||s[i]=='o'||s[i]=='u') a[i]++;
  else b[i]++;
  }
  // for (int i=0;i<s.size();i++) cout << a[i] << " ";
  // cout << endl;
  // for (int i=0;i<s.size();i++) cout << b[i] << " ";
  // cout << endl;
  int d=0;
  if (a[0]==1) d=b[s.size()-1];
  else d=a[s.size()-1];
  // cout << d;
  for (int i=1;i<s.size();i++)
  {
  if (s[i]=='a'||s[i]=='e'||s[i]=='i'||s[i]=='o'||s[i]=='u') d+=(b[s.size()-1]-b[i]);
  else d+=(a[s.size()-1]-a[i]);
  }
  cout << d;
  return 0;
  }

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