#include<bits/stdc++.h> using namespace std; int i,j=1,k,n; char a[30]; int main(){ while(cin>>a[n]){ j++; } for(i=1;i<=j;i++){ if(a[i]=='a'||a[i]=='e'||a[i]=='u'||a[i]=='i'||a[i]=='o'){ n=i; k++; break; } } if(i==j&&k==1){ cout<<0; }else{ cout<<n; } return 0; }