#include <bits/stdc++.h>
int main() {
  char a[100];
  int b, c, i, sum;
  while (scanf("%s", a) != EOF) {
    sum = 0;
    b = strlen(a);
    for (i = 0; i < b; i++) {
      if (a[i] == '1' || a[i] == '3' || a[i] == '5' || a[i] == '7' ||
          a[i] == '9' || a[i] == 'a' || a[i] == 'e' || a[i] == 'i' ||
          a[i] == 'o' || a[i] == 'u')
        sum++;
    }
    printf("%d\n", sum);
  }
}
