#include<stdio.h>
#include<string.h>
#include<ctype.h>
int  main(){
    char s[101];
    int i;
    int vowel_count=0;
    int is_invalid=0;
    if(fgets(s,101,stdin)==NULL){
        return 1;
    }
    s[strcspn(s,"\n")]=0;
    for(i=0;s[i]!='\0';i++){
        char c=s[i];
        if(!isalpha(c)&&c!=''){
            is_invalid=1;
            break;
        }
        char lower_c=tolower(c);
        if(lower_c=='a'||lower_c=='e'||lower_c=='i'||lower_c=='o'||lower_c=='u'){
            void_count++;
        }
    }
    if(is_invalid){
        printf("Invalid iput\n");
    }else{
        printf("%d\n",vowel_count);
    }
    return 0;
}