#include <stdio.h>
#include <string.h>
#include <ctype.h>
int main() {
    char s[100];
    int count = 0, i, len = strlen(s), valid = 1;
    
    fgets(s, sizeof(s), stdin); 
    
    
    for (i = 0; s[i] != '\0' && s[i] != "\n"; i++) {
        if (!isalpha(s[i]) && s[i] != ' ') {
            valid = 0;
            break;
        }
        if (isalpha(s[i])){
            char ch = tolower(s[i]);
            if (ch == 'a' || ch == 'e' || ch == 'i' || ch == 'o' || ch == 'u') {
                count++;
            }
        }
    }
    if (valid) {
        printf("%d", count);
    } else {
        printf("Invalid input");
    }
    return 0;
    
}