va contando de adelante para atrás
va contando de adelante para atrás .
β a WORD_BOUNDARY k o̞ n t a n d o̞ WORD_BOUNDARY d e̞ WORD_BOUNDARY a d e̞ l a n t e̞ WORD_BOUNDARY p a ɾ a WORD_BOUNDARY a t ɾ a s WORD_BOUNDARY
v a WORD_BOUNDARY c o n t a n d o WORD_BOUNDARY d e WORD_BOUNDARY a d e l a n t e WORD_BOUNDARY p a r a WORD_BOUNDARY a t r á s WORD_BOUNDARY . WORD_BOUNDARY