#include "stdio.h"

struct SNo
{
	 int c;
	 SNo * prox;
	 SNo * ant;
};

SNo * l;
SNo * v;
SNo * c;

void Insere(SNo * * fim, char c);

void main()
{
         int i;
         SNo * no;

         for( i = 'A' ; i < 'A'+26; ++i)
         {
            Insere(&l,i);
         }            

	 for( no = l ; no != NULL ; no=no->ant )
	 {
		 printf("%c ",no->c);
                 if( no->c == 'A' || no->c == 'E' || no->c == 'I' ||
                     no->c == 'O' || no->c == 'U' )
                 {
                     Insere(&v,no->c);
                 }  
                 else
                 {
                     Insere(&c,no->c);
                 }

	 }
	 printf("\n");

         for( no = v ; no != NULL ; no=no->ant)
         {
             printf("%c ",no->c);
         }
         printf("\n");

         for( no = c ; no != NULL ; no=no->ant)
         {
             printf("%c ",no->c);
         }
         printf("\n");
}

void Insere(SNo * * fim, char c)
{
		SNo * no;

		no = new SNo;

		no->c = c;
		no->prox = NULL;
		no->ant = *fim;
		*fim = no;

}