Scanner scan= new Scanner(System.in);
         int val = scan.nextInt();
         String b[]= {"a","e","i","o","u"};

         Set<String>  uniq= new HashSet<>();
         ArrayList<String> arr= new ArrayList<>();

         for(int i=1;i<=val;i++) {
             if(uniq.isEmpty()) {
                 for(int j=0;j<b.length;j++) {
                     uniq.add(b[j]);
                 }
             }
             else {
                 List<String>  copy= new ArrayList<String>(uniq);
                 for(int j=0;j<b.length;j++) {

                    for(String object : copy) {
                        String element = (String) object;
                        uniq.add(element+b[j]);
                    }


                 }
             }
             }
         System.out.println("Set Size= "+uniq.size());
        Iterator<String>     ite= uniq.iterator();
        while (ite.hasNext()) {
            String v=ite.next();
            int len= v.length();
            if(len==val) {
                arr.add(v);
            }
        }
        Collections.sort(arr);;
         for(int l=0;l<arr.size();l++) {
             System.out.print(arr.get(l)+" ");
         }
         System.out.println("");
         System.out.println(arr.size());