#include <bits/stdc++.h>
using namespace std;
int main() {
  std::ios::sync_with_stdio(false);
  int T;
  T = 1;
  while (T--) {
    int n, i, j;
    string second;
    cin >> second;
    int ct = 0;
    for (i = 0; i < second.length(); ++i)
      if (second[i] == 'a' || second[i] == 'e' || second[i] == 'i' ||
          second[i] == 'o' || second[i] == 'u')
        ++ct;
      else if (second[i] >= 48 && second[i] <= 57 && (second[i] - '0') % 2 == 1)
        ++ct;
    cout << ct << endl;
  }
  return 0;
}
