#include<bits/stdc++.h>
using namespace std;
int main(){
	string s;
	int a[5];
	getline(cin,s); 
	a[0]=s.find('a');
	a[1]=s.find('e');
	a[2]=s.find('i');
	a[3]=s.find('o');
	a[4]=s.find('u');
	int min=a[0];
	for(int i=1;i<=4;i++){
		if(a[i]<min&&a[i]!=-1){
			min=a[i];
		}
	}
	cout<<min+1;
	return 0;
}

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