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

int main() {
    char str[101];
    int vowels = 0;
    int is_valid = 1;
    
    fgets(str, sizeof(str), stdin);
    
    for (int i = 0; str[i] != '\0'; i++) {
        if (str[i] == '\n') {
            str[i] ='\0';
            break;
        }
        
        if(!isalpha(str[i])) {
            is_valid = 0;
            break;
        }
        
        char ch = tolower(str[i]);
        if (ch == 'a' || ch == 'e' || ch == 'i' || ch == 'o' || ch == 'u') {
            vowels++;
        }
    }
    
    if (is_valid) {
        printf("%d\n", vowels);
    } else {
        printf("Invalid input")
    }
}