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