#include <stdio.h>
#include <ctype.h>
#include <ctype.h>


int count_vowels(char *str) {
    int count = 0;
    for (int i = 0; str[i]; i++) {
        char ch = tolower(str[i]);
        if (ch == 'a' || ch == 'e' || ch == 'i' || ch == '0' || ch == 'u') {
            count++;
        }
    }
    return count;
}
 
 int main() {
     char str[100];
     scanf("%99s", str);
     
     int len = strlen(str);
     if (len < 1 || len > 99) {
         printf("Invalid input\n");
         return 0;
     }
     
     for (int i = 0; i < len; i++) {
         if (!((str[i] >= 'a' && str[i] <='z') || (str[i] >= 'A' && str[i] <= 'Z'))) {
             printf(Invalid input\n);
             return 0;
         }
     }
     
     printf("%d\n", count_vowels(str));
     
     return 0;
 }