#include "stdio.h"

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

SNo * l = NULL;
SNo * v = NULL;
SNo * c = NULL;

void main()
{
         int i;
         SNo * no;
         SNo * no2;

         for( i = 'A' ; i < 'A'+26; ++i)
         {
		no = new SNo;

		no->c = i;
		no->prox = NULL;
		no->ant = l;
	        l = no;
         }            

	 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' )
								 {
										 no2 = new SNo;
										 no2->c = no->c;
										 no2->prox = NULL;
										 no2->ant = v;
										 v = no2;
								 }
								 else
								 {
										 no2 = new SNo;
										 no2->c = no->c;
										 no2->prox = NULL;
										 no2->ant = c;
										 c = no2;
								 }

	 }
	 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");
}