#include<stdio.h>
#include<string.h>
#include<ctype.h>
int main(){
    char s[101];
    int vowel_count = 0;
    int is_valid = 1;
    // scanf("%s", s);
    fgets(s,101,stdin);
    for(int i = 0; s[i] != '\0'; i++){
        if(isdigit(s[i] || ispunct(s[i])){
            is_valid = 0;
            break;
        }
    }
    if(is_valid){
        for(int i = 0; s[i] != '\0'; i++){
            char ch = tolower(s[i]);
            if(ch == 'a' || ch == 'e' || ch == 'i' || ch == 'o' || ch == 'u'){
                vowel_count++;
            }
        }
        printf("%d\n", vowel_count);
    } else {
        printf("Invalid input\n");
    }
    return 0;
}