#include<bits/stdc++.h>
using namespace std;
int a[5];
int main(){
	string s;
	cin>>s;
	int min,z=0;
	a[0]=s.find("a")+1;
	a[1]=s.find("e")+1;
	a[2]=s.find("i")+1;
	a[3]=s.find("o")+1;
	a[4]=s.find("u")+1;
	min=a[0];
	for(int i=1;i<5;i++){
		if(a[i]==0) z++;
		else if(a[i]<min) min=a[i];
	}
	if(z==5) cout<<0;
	else cout<<min;
	return 0;
}
/**************************************************************
	Problem: 1844
	User: zhangziang
	Language: C++
	Result: Wrong Answer
****************************************************************/