// editor2
#include<iostream>
#include<string>
using namespace std;
int main(){
    string a;
    getline(cin, a);
    if (a.length()<1 || a.length()>100){
        cout<<"Invalid input";
        return 0;
}
int count = 0;
for(char ch : a){
    ch = tolower(ch);
    if (ch == 'a' ||ch == 'e' ||ch == 'i' ||ch == 'o' ||ch == 'u' ){
        count++;
    }
}
    if(count == 0){
        cout<<"Invalid input";
    }
    else{
        cout<<count;
    }
    return 0;
    }
}