#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'){
            count++;
        }
    }
    
    if(count ==0){
        cout<<"Invalid input";
        
    }
    else{
        cout<<count;
    }
    return 0;
}