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

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