#include <bits/stdc++.h>
using namespace std;
const char vowel[6] = {"aeiou"};
int main() {
  char str[200];
  while (~scanf("%s", str)) {
    int len = strlen(str), ans = 0;
    for (int i = 0; i < len; ++i) {
      if (str[i] >= 'a' && str[i] <= 'z') {
        for (int j = 0; j < 5; ++j)
          if (str[i] == vowel[j]) ++ans;
      } else if (str[i] >= '0' && str[i] <= '9') {
        int num = str[i] - '0';
        if (num & 1) ++ans;
      }
    }
    printf("%d\n", ans);
  }
  return 0;
}
