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

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