// editor1
#include <iostream>
#include <string>
using namespace std;

int main()
{
    string s, rs = "";
    
    for(char i:s)
    {
        rs += tolower(i);
    }
    
    int c = 0;
    
    if(!(s.size()>=1 && s.size()<=100))
    return 0;
    
    for(char i:s)
    {
        if(i == 'a' || i == 'e' || i == "i" || i == 'o' || i == 'u')
        c++;
    }
    
    if(c == 0)
    {
        cout << "Invalid input";
        return 0;
    }
    
    cout << c;
    return 0;
}