#include <bits/stdc++.h>
int main() {
  int i, Count = 0;
  char Cards[51];
  gets(Cards);
  for (i = 0; i < 51; i++) {
    if (Cards[i] == 0) {
      break;
    }
    if (Cards[i] == 'a' || Cards[i] == 'e' || Cards[i] == 'i' ||
        Cards[i] == 'o' || Cards[i] == 'u') {
      Count++;
    } else if (Cards[i] == '1' || Cards[i] == '3' || Cards[i] == '5' ||
               Cards[i] == '7' || Cards[i] == '9') {
      Count++;
    }
  }
  printf("%d\n", Count);
  return 0;
}
