#include <bits/stdc++.h>
using namespace std;
map<long long, long long> mp;
map<long long, long long> mpmim;
char grid[8][8];
pair<int, int> a[40];
bool v(char x) {
  if (x == 'a' || x == 'e' || x == 'i' || x == 'u' || x == 'o') return 1;
  return 0;
}
bool v1(char x) {
  if (x == '1' || x == '3' || x == '5' || x == '7' || x == '9') return 1;
  return 0;
}
int main() {
  int sum = 0, sum1 = 0;
  string x;
  cin >> x;
  for (int i = 0; i < x.size(); i++) {
    if (v(x[i])) {
      sum++;
    } else if (v1(x[i])) {
      sum1++;
    }
  }
  cout << sum + sum1 << endl;
  return 0;
}
