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