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