#include<iostream>
#include<string>
#include<algorithm>

int main()
{
    string s;
    getline(cin, s);
    
    int count = 0;
    
    for(char c: s)
    {
        c = tolower(c);
        if(c=='a' || c=='e' || c=='i'||c=='o'||c=='u')
        count++;
    }
    if(count==0)
        cout<<"Invalid input";
    else
        cout<<count;
    
    return 0;
}