#include<iostream>
using namespace std;
int main(){
    string s;
    getline(cin,s);
    int cout = 0;
    for (char c:s){
        if (c=='a'||c=='e'||c=='i'||c=='o'||c=='u'||c=='A'||c=='E'||c=='I'||c=='O'||c=='U'||){
                count++;
            }
    }
    if (count == 0)
        cout<< "invalid input";
    else
    cout<<count;
    return 0;
}