#include<iostream>
#include<cctype>
using namespace std;
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;
}