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