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