#include<bits/stdc++.h>
using namespace std;
int main(){
string s;
cin>>s;
int a=0;
for(int i=0;i<s.size();i++){
	if(s[i]=='a'||s[i]=='e'||s[i]=='i'||s[i]=='o'||s[i]=='u'){
		a=a+1;
	}
}
cout<<a;
	return 0;
}

/**************************************************************
	Problem: 1844
	User: huxuanchen
	Language: C++
	Result: Wrong Answer
****************************************************************/