#include <bits/stdc++.h>
using namespace std;
int main() {
  int sum = 0;
  string in;
  cin >> in;
  for (char x : in) {
    if (x == 'a' || x == 'e' || x == 'i' || x == 'o' || x == 'u')
      sum++;
    else if (x == '1' || x == '3' || x == '5' || x == '7' || x == '9')
      sum++;
  }
  cout << sum;
}
