#include<iostream>
using namespace std;
int main(){
    string s;
    getline(cin, s);
    int count = 0;
    for(char c : s){
        if(c=='a||c=='e'||c=='i'||c=='o'||c=='u'||
           c=='A||c=='E'||c=='I'||c=='O'||c=='U'){
               count++;
           }
    }
    if(count == 0)
       cout<<"Invalid input";
    else
       cout<< count;
    return 0;   
    
}